Unique identifier for a calendar item within the Exchange store. This is used to reference the item in queries and operations. This property is read-only and crucial for data integrity.

Holds the raw Multipurpose Internet Mail Extensions (MIME) content of the calendar item, encoded in Base64. This content includes the full message body and headers, enabling compatibility with external email systems.

A version-specific identifier used to detect changes to the calendar item. This ensures concurrency control when multiple updates occur. This property is read-only.

Specifies the unique identifier of the folder that contains the calendar item. This is useful for organizing and locating the item within a user's mailbox. This property is read-only.

Identifies the version of the parent folder containing the item. This is used to track updates or changes to the folder's structure. This property is read-only.

Indicates the message class of the calendar item, such as IPM.Appointment. This helps Exchange interpret how to process or display the item.

Defines the subject or title of the calendar event. This is a short text string visible in calendar views, with a character limit of 255.

Specifies the sensitivity setting for the calendar item, such as Normal, Personal, Private, or Confidential. It controls visibility to other users.

The main content or description of the calendar event. May include meeting details, agenda items, or notes. This can be formatted as plain text or HTML.

Records the exact date and time the calendar item was received into the mailbox, which is primarily relevant for meeting requests or responses.

Total size of the calendar item in bytes, including all associated properties, attachments, and metadata. This property is read-only.

Lists one or more user-defined categories assigned to the calendar item, such as Red Category, Travel, Finance. It supports color-coded organization.

Indicates the priority level of the calendar item, such as Low, Normal, or High. It helps users prioritize tasks and meetings.

Holds the unique identifier of another item that this calendar item replies to, such as a meeting request. It supports threaded conversations.

True if the calendar item has been sent from the Outbox. This is used to confirm submission of meeting requests or updates.

True if the calendar item is still in draft form and has not been sent or finalized. Useful for saving work-in-progress meeting details.

Indicates whether the current user is both the sender and recipient of the item. This is typically true for personal reminders or self-created events.

True if the calendar item was previously sent and is being sent again. This helps track resubmitted or updated events.

True if the item remains in its original state without any changes since it was received or created.

Contains the complete collection of Internet message headers for the calendar item, providing metadata such as sender IP address, routing information, content encoding, and client application details. Useful for tracing email origins and diagnostics.

Specifies the exact date and time when the calendar item, such as a meeting request or appointment, was sent from the user's mailbox.

Indicates the timestamp when the calendar item was originally created in the Exchange store, which can differ from the sent or received time.

Specifies the date and time at which the reminder for this event is scheduled to trigger. This is typically calculated relative to the event's start time.

Identifies whether a reminder is actively configured for the calendar item. If true, a notification will be shown based on the ReminderMinutesBeforeStart value.

Indicates how many minutes before the event start time the user will receive a reminder notification. This value is user-configurable.

Provides a concatenated, comma-separated list of display names of all recipients in the Cc (Carbon Copy) field of the message or meeting invitation.

Contains the display names of all primary recipients (To field) as a single, comma-separated string, representing how recipients are shown in the user interface.

Indicates whether the calendar item includes any attachments, such as meeting agendas, documents, or images. True if at least one attachment is present.

Specifies the culture setting (locale) associated with the item, such as language and regional formatting preferences (for example, en-US, fr-FR).

Represents the start date and time of the calendar event. This value defines when the event is scheduled to begin.

Represents the end date and time of the calendar event. This value defines when the event is scheduled to conclude.

Holds the original start date and time for a calendar event, particularly useful for tracking rescheduled or recurring instances.

Indicates whether the calendar item spans the entire day (midnight to midnight) without a specific start or end time. Common for holidays or reminders.

Defines the availability status of the user during the time block occupied by the event. Possible values include Free, Tentative, Busy, Out of Office.

Provides the physical or virtual location where the event is set to occur. This could be a meeting room, address, or an online meeting link.

Returns a user-friendly string that describes when the event is scheduled (for example, Monday, March 3, 2025 at 2:00 PM – 3:00 PM). This is typically used for display purposes.

Indicates whether the calendar item is a meeting involving multiple attendees or a personal appointment with only the organizer.

True if the meeting or appointment has been cancelled by the organizer or system. This helps inform invitees or prevent further actions.

Identifies whether the item is part of a recurring series of events. This flag is system-managed and cannot be manually altered.

Shows whether a meeting invitation has been dispatched to the intended recipients from the organizer's mailbox.

Indicates whether the meeting organizer has requested attendees to respond (Accept, Decline, Tentative) to the invitation.

Indicates the category of the calendar item, such as a single appointment, recurring meeting, or exception to a recurring series. Helps clients interpret how the item behaves in the calendar workflow.

Captures the attendee's current response to the calendar invitation, such as Accepted, Declined, Tentative, or NotResponded. Useful for tracking attendee availability and meeting status.

Stores the display name of the meeting organizer, typically a user or service account that scheduled the calendar item.

Contains the SMTP email address of the calendar item organizer. Used to identify the originator of the meeting request or appointment.

Defines the protocol used to route messages to the organizer's mailbox, such as SMTP or EX. Important for mail transport and calendar federation.

Specifies the total number of other meetings that overlap in time with this calendar item. Useful for scheduling assistants and availability conflict detection.

Specifies the number of calendar items scheduled immediately before or after the current item without overlapping. Often used in UI calendar layout calculations or scheduling suggestions.

Represents the total time span of the calendar item in a textual format, such as 'PT1H30M' (1 hour and 30 minutes).

Provides a descriptive label for the time zone in which the calendar item is scheduled, such as 'Pacific Standard Time' or 'UTC'.

Captures the exact date and time when the attendee responded to a meeting request. Used for auditing response history and tracking changes in participation.

Tracks the versioning of an appointment, where each update to the calendar item increments the sequence. Ensures clients display the most recent version of a recurring event.

Represents the current lifecycle state of the appointment, such as 'Scheduled', 'Cancelled', or 'Updated'. Helps synchronize item status across clients.

Defines the pattern of recurrence for a calendar item, such as Daily, Weekly, Monthly, or Yearly. Drives how the item is repeated in the calendar.

The allowed values are RelativeYearlyRecurrence, AbsoluteYearlyRecurrence, RelativeMonthlyRecurrence, AbsoluteMonthlyRecurrence, WeeklyRecurrence, DailyRecurrence.

Lists the days of the week on which a recurring item occurs. Common values include Monday,Wednesday,Friday or Tuesday,Thursday.

Indicates the position of a specific weekday within a month for relative recurrence patterns, such as First, Second, Third, or Last.

The allowed values are First, Second, Third, Fourth, Last.

Specifies the calendar month in which a yearly recurring item occurs, such as January or December.

Indicates the specific day within the month on which the recurring item occurs, such as 15 for the 15th day of each month.

Specifies the number of time units between recurring occurrences. For example, an interval of 2 with a Weekly type means the event repeats every 2 weeks.

Indicates the starting day of the week for the recurrence pattern. This affects how weekly patterns are calculated and displayed.

Specifies how long the recurrence pattern should continue, such as 'Indefinite', 'Fixed number of occurrences', or 'Until end date'.

The allowed values are NoEndRecurrence, EndDateRecurrence, NumberedRecurrence.

The date when the recurrence pattern begins. This is the first occurrence of the recurring calendar item.

The date when the recurrence pattern ends. No further occurrences are scheduled beyond this date.

Specifies the total number of instances for a recurring calendar event. This helps determine the span or extent of a recurrence pattern.

Unique identifier for the first occurrence in a recurring calendar series. Used to retrieve or manage the first event instance.

Start time of the first occurrence in a recurring calendar series, expressed in the appropriate time zone and format.

End time of the first occurrence in a recurring calendar series. Used for duration and scheduling calculations.

Original scheduled start time of the first occurrence in a recurring series, before any modifications.

Unique identifier for the final occurrence in a recurring calendar series. Useful when navigating or modifying the end of the recurrence.

Start time of the final scheduled occurrence in a recurring calendar event. Used to assess the duration and conclusion of the series.

End time of the final occurrence in a recurring calendar event, factoring in any applied recurrence rules.

Original start time of the final occurrence in a recurring series, before any changes or overrides were made.

A semicolon-separated list representing modified occurrences in the recurring event series. Each entry includes data like start time, end time, or changes made to a specific instance.

A semicolon-separated list of deleted occurrences in a recurring series. This is used to track and differentiate removed instances from the original recurrence pattern.

Identifier that maps to the time zone definition used for interpreting the start time of the event. Supports accurate time alignment across regions.

Descriptive name of the time zone associated with the event's start time, such as 'Pacific Standard Time' or 'UTC+01:00'.

Identifier for the time zone used to compute the event's end time. Ensures correct display and calculation of event duration.

Descriptive name of the time zone used for the event's end time, such as 'Eastern Standard Time'.

Specifies the type of conferencing associated with the meeting. Values include 0 = NetMeeting, 1 = NetShow, 2 = Chat. Helps determine the nature of collaboration tools used.

Indicates whether attendees can propose a new time for the meeting, allowing more flexible scheduling options for organizers and participants.

Flags whether the meeting is designated as an online meeting, enabling remote participation features such as video conferencing or chat.

Contains the full URL to the meeting workspace where additional resources, documents, or agendas related to the meeting can be accessed.

URL for a Microsoft NetShow session associated with the meeting, providing access to multimedia presentations or streaming content.

Indicates whether the connected client has permission to create items in the associated contents table for the calendar item, often relevant for metadata or linked objects.

Indicates whether the user has permission to create new items within a folder's contents, such as messages or calendar entries.

Indicates whether the user has permission to create subfolders or organize content hierarchically within the folder.

Indicates whether the user has permission to delete the specified folder or item within the Exchange store.

Indicates whether the user has permission to modify the properties or content of the specified folder or item.

Indicates whether the user has permission to read the contents or metadata of the specified folder or item.

Indicates whether the user is allowed to view items marked as private within the folder, such as private appointments or emails.

Stores the display name of the user who last modified the item, providing traceability for auditing or collaboration purposes.

Indicates the timestamp of the last modification made to the item, reflecting the most recent update activity.

Specifies whether the item is associated with a folder as a non-visible system item, such as a rule or view configuration.

Represents the query string to append to the Outlook Web App base URL to open the item in read mode via a web client.

Represents the query string to append to the Outlook Web App base URL to open the item in edit mode via a web client.

Contains the unique identifier of the conversation to which the item belongs, used to group related messages or calendar events.

Contains the change key used to track updates to the conversation, supporting concurrency and version control.

Provides the portion of the message body that is unique to this item, excluding duplicated text from previous messages in the conversation.

Indicates the format of the unique body content, with supported values being HTML or TEXT.

Specifies the identifier of the user to impersonate when accessing Exchange data, enabling delegated access scenarios.

Defines the type of identifier used to specify the impersonated user. Supported values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Specifies how meeting invitations are sent for a calendar operation. Valid values are SendToNone, SendOnlyToAll, and SendToAllAndSaveCopy. Default is SendToNone.

Specifies how meeting cancellations are distributed when a calendar item is deleted or changed. Allowed values: SendToNone, SendOnlyToAll, SendToAllAndSaveCopy. Default is SendToNone.

Contains the email address of the shared mailbox to retrieve calendar events from. Useful when accessing calendars that belong to shared or departmental mailboxes.

The email address of the optional attendee being added to the calendar event. This must be a valid SMTP address recognized by the Exchange system.

A unique identifier referencing the calendar item to which the optional attendee is being added. This ID ensures the attendee is linked to the correct event.

The display name of the optional attendee. This name is typically shown in the attendee list for the event.

Specifies the user account to impersonate when performing the operation. This is required for delegated access scenarios where actions are taken on behalf of another user.

Defines the format of the impersonation identifier. Supported values are PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress. This determines how the target user is resolved during impersonation.

Controls the behavior for sending meeting invitations after modifying attendees. Valid options are SendToNone, SendOnlyToAll, SendOnlyToChanged, and SendToAllAndSaveCopy. The default behavior is SendToNone, meaning no invitations will be sent unless specified.

Specifies the email address of a required attendee for the calendar event. This address is used to send meeting invitations and track responses.

Represents the unique identifier of the calendar item (such as a meeting or appointment) to which the required attendee is being added.

Displays the display name of the required attendee as it appears in the calendar item or contact list.

Specifies the identifier of the user account to impersonate during the request. This allows actions to be performed on behalf of another user.

Indicates the type of identifier used for impersonation. Accepted values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Determines how meeting invitations are handled after the calendar event is created or modified. Possible values include SendToNone, SendOnlyToAll, SendOnlyToChanged, and SendToAllAndSaveCopy. The default behavior is SendToNone.

Provides the unique identifier assigned by the Exchange store to a contact item. This value is required to retrieve or reference the contact and is immutable and read-only.

Contains the raw content of the contact item in Multipurpose Internet Mail Extensions (MIME) format, encoded as Base64. This field is used for interoperability with external systems that handle MIME-based message representations.

Specifies a unique version identifier for the contact item. This key updates whenever the item is modified and helps to manage concurrency and track changes. It is read-only.

Identifies the folder in which the contact is stored. This ID is unique within the Exchange store and is used to trace the contact's hierarchy. It is read-only and primarily used for organizational queries.

Stores the unique change key for the folder containing the contact. This value updates when the folder is modified and is used to detect structural or content changes within the folder. It is read-only.

Indicates the type of the item based on Exchange classification. For contact items, this is typically set to 'IPM.Contact', but can vary if custom message classes are used.

Provides a short text summary or label for the contact item, often used as the display name or quick reference. The subject can contain up to 255 characters and is commonly visible in UI listings.

Represents the sensitivity classification of the contact, such as Normal, Personal, Private, or Confidential. This field helps users and systems determine how the contact data should be handled.

Contains the main text content associated with the contact, such as notes or background information. This can include user-entered freeform text and is often used to provide context or descriptions.

Captures the timestamp of when the contact item was received or created in the mailbox. This datetime value is useful for sorting or filtering contacts based on recency.

Indicates the total size of the contact item in bytes, including metadata and body content. This value is useful for storage management and is automatically calculated by Exchange. It is read-only.

Holds a semicolon-separated list of category labels applied to the contact. These categories help organize and group contact items for easier retrieval or color-coding in the user interface.

Defines the priority level assigned to the contact. Typical values include Low, Normal, and High, allowing clients to rank or highlight contacts based on their relative significance.

Specifies whether the contact item has been successfully submitted to the Outbox default folder, indicating it is in the process of being sent or has been queued for sending.

Stores the identifier of the original item to which the current item is a response, enabling threaded conversation tracking in messaging systems.

Indicates whether the contact item is currently saved as a draft, meaning it is incomplete or has not yet been finalized or sent.

Determines whether the item was sent by the user to themselves, which can occur in scenarios such as self-reminders or test messages.

Indicates whether this item is a re-sent version of a previously sent message, typically used in retry or correction workflows.

Identifies whether the item has remained unchanged since it was created or last saved, useful for detecting edited or updated records.

Contains the full set of Internet message headers associated with an item in a mailbox, including metadata such as Received, Subject, From, To, Date, Message-ID, MIME-Version, Content-Type, and other transmission-related fields.

Records the exact date and time the contact-related item was sent from the user's mailbox, useful for chronological sorting and delivery auditing.

Captures the timestamp when the contact item was originally created in the mailbox, regardless of whether it was later modified or sent.

Specifies the date and time by which a reminder associated with the contact item is due, helping trigger alerts or notifications for follow-up actions.

Specifies whether a reminder notification is enabled for this Exchange item. A value of true means the user will receive a reminder prior to the start time of the associated event or task.

Defines how many minutes before the scheduled start time a reminder should appear. Commonly used for appointments, tasks, or meeting requests.

Contains the display-friendly, comma-separated list of recipients in the Cc (Carbon Copy) field. This string aggregates recipient display names for rendering in user interfaces.

Contains the display-friendly, comma-separated list of recipients in the To field. This string aggregates recipient display names as shown in email clients or message previews.

Indicates whether the item includes one or more visible file attachments. This flag is set to true if attachments are present and accessible by users.

Specifies the locale or cultural setting applied to the item, such as 'en-US' or 'fr-FR'. This can affect date formats, regional settings, and language display.

Indicates whether the user or client application has permission to create associated contents for the item, typically used for hidden or metadata-bound items within a folder.

Indicates whether the user or client application has permission to add new content items (such as messages or events) to the folder.

Indicates whether the user or client application is allowed to create subfolders within the current folder, forming part of the folder hierarchy.

Indicates whether the user or client application has permission to delete the folder or individual item.

Indicates whether the user or client application can update or change the contents of the folder or item, including properties or data values.

Indicates whether the user or client application is permitted to view the contents of the folder or item, including metadata and body content.

Indicates whether the user or client has visibility into private items—typically calendar events or tasks marked as private by another user.

Specifies the display name of the user who most recently modified the contact item. This helps track changes and determine ownership of updates.

Captures the timestamp of the most recent modification to the contact item. This field is maintained automatically and is read-only.

Indicates whether the contact item is associated with a specific folder, such as a system or hidden folder used for metadata or conversation tracking.

Provides a URL query string that, when appended to the Outlook Web App endpoint, allows users to view the contact item directly in the browser.

Provides a URL query string that enables users to open the contact item in edit mode using the Outlook Web App interface.

Stores the identifier that links the contact item to a broader conversation thread in the Exchange environment. Useful for conversation grouping and tracking.

Contains the unique portion of the message body that is specific to the current contact item, excluding any redundant or quoted content. This can be formatted as HTML or plain text.

Indicates the format used to store the unique body content, such as HTML or TEXT, to assist in rendering or parsing the message body appropriately.

Defines how the contact or distribution list should be sorted and displayed within the Contacts folder. Common formats include Last Name, First Name or Company Name.

Determines the logic used to construct the 'File As' value for the contact, typically based on selected fields like first name, last name, or company.

Represents the display name shown for the contact, distribution list, rule, delegate user, or location. This value is typically user-friendly and used in UI listings.

Stores the first name or given name of the contact, which can be used in sorting, searching, or composing personalized messages.

Stores the abbreviated initials of the contact's full name, commonly derived from the first letter of each part of the name (for example, J.D. for John Doe).

Contains the middle name or initial of the contact, used for full name representation and identity disambiguation.

Holds the informal or familiar name by which the contact is commonly known, distinct from their legal first name.

Specifies the contact's formal title or honorific (such as Mr., Mrs., Dr., or Prof.), often used for professional or formal correspondence.

Represents the given name or first name of the contact, used in full name formatting and indexing.

Contains the contact's middle name component, supporting full name rendering and cultural name structures.

Stores the contact's family name or surname, which is often used for sorting and official identification.

Indicates any generational or academic suffix associated with the contact's name, such as Jr., Sr., III, or Ph.D.

Captures the initials derived from the complete name of the contact, typically used for concise display or indexing.

Stores the contact's full name as a single string, constructed from title, first, middle, last name, and suffix, depending on availability.

Represents the nickname associated with the contact's full name, used for personalization in informal communications.

Contains the Yomi phonetic representation of the contact's first name, used for proper pronunciation and sorting in Japanese systems.

Contains the Yomi phonetic representation of the contact's last name, used for proper pronunciation and sorting in Japanese systems.

Stores the name of the company or organization with which the contact is affiliated, useful for business context and categorization.

Stores the primary email address associated with the contact. This address is typically used as the main point of electronic communication.

Stores an alternative email address for the contact. This is useful when the contact has more than one email account for different purposes such as personal or secondary work use.

Stores a third email address for the contact, allowing users to track multiple active addresses, such as temporary, external, or archived accounts.

Contains the street component of the business address where the contact works. This can include building number, street name, and suite or office details.

Indicates the city portion of the contact's business address, often used for filtering or grouping contacts by location in organizational directories.

Captures the state or province associated with the business address of the contact. This can be useful in regional reporting or compliance processes.

Specifies the country or region in which the contact's business address is located. Used in cross-border communications and location-based filtering.

Stores the postal or ZIP code for the contact's business address. This field supports geographic sorting and mailing list generation.

Holds the street information for the contact's residential address. May include house number, street name, and apartment or unit number.

Indicates the city associated with the contact's home address, often used in demographic profiling or personal contact organization.

Specifies the state or province of the contact's residential location. This can assist in regional segmentation or mail delivery validation.

Stores the country or region of the contact's home address, providing context for time zone, language, and cultural preferences.

Captures the postal or ZIP code related to the home address of the contact. This can aid in delivery services or local search filtering.

Contains the street address for an additional contact location, such as a vacation home, alternate office, or temporary residence.

Specifies the city name associated with the secondary (Other) address of the contact. This is typically used when a contact has more than one address.

Indicates the state, province, or administrative region corresponding to the Other address of the contact.

Captures the name of the country or region for the Other address associated with the contact. This is used when the contact maintains an alternate or secondary location.

Holds the postal or ZIP code corresponding to the Other address of the contact, which can be used for location-based filtering or mail delivery purposes.

Stores the phone number of the contact's assistant. This field is often used in organizational contexts to reach someone who manages the contact's schedule or communications.

Contains the fax number for the contact's primary place of business. This field supports legacy communication methods still used in some industries.

Lists the primary business phone number for the contact, typically used during standard work hours or for professional communication.

Provides a secondary business phone number for the contact, allowing for alternate professional contact options if the primary line is unavailable.

Designates a specific phone number the contact has requested to be called back on. This can differ from their primary or business numbers.

Stores the contact's car phone number, used in contexts where in-vehicle communication is supported and relevant.

Captures the main switchboard or general phone number of the company with which the contact is affiliated. Often used when individual extensions are not known.

Specifies the fax number associated with the contact's home address. This value is typically used for sending documents to a personal fax line.

Indicates the primary landline telephone number at the contact's home residence. Commonly used for personal or non-business-related communication.

Captures an additional home phone number for the contact, allowing for multiple residential contact options.

Contains the Integrated Services Digital Network (ISDN) number for the contact, used in environments where digital telecommunication is supported.

Stores the contact's primary mobile or cell phone number, generally used for direct and immediate personal communication.

Provides an alternative fax number not associated with the home address, potentially linked to another residence or secondary location.

Holds a secondary phone number for the contact that does not fall under home, business, or mobile categories. Useful for less common communication channels.

Stores the contact's pager number, which can be used in legacy systems or industries that still rely on pager communication.

Defines the contact's main telephone number for general communication, regardless of whether it is mobile, home, or business.

Captures the contact's radio telephone number, typically used in industries like maritime, aviation, or emergency services that rely on radio communication devices.

Specifies the telex number for the contact, supporting international text-based communication in legacy messaging networks.

Contains the telephone number used with TTY (Text Telephone) or TDD (Telecommunication Device for the Deaf) devices to facilitate communication for individuals with hearing or speech impairments.

Specifies the full name of the contact's personal assistant, if applicable. This can be used for coordination or communication purposes.

Indicates the contact's date of birth. This field supports date-based reminders and personalization features in calendar or CRM systems.

Provides the URL of the contact's professional or business-related home page. This could be a company website or a professional profile.

Stores the name of the first child associated with the contact. Used to personalize interactions or for recordkeeping in directory-based systems.

Stores the name of the second child associated with the contact. This field is optional and complements Children_1 and Children_3.

Stores the name of the third child associated with the contact. Intended for contacts with multiple dependents to support family-related tracking.

Contains the name of the first company the contact is affiliated with. Useful for professional context and organizational relationships.

Contains the name of the second company associated with the contact. Helps capture multiple business affiliations if they exist.

Contains the name of the third company linked to the contact. Supports scenarios where the contact is involved in several organizations.

Specifies the origin of the contact data, such as whether it is sourced from the Exchange mailbox store or from Active Directory Domain Services.

Captures the internal department or organizational unit the contact is part of. Commonly used to group or filter contacts in enterprise directories.

Includes generational suffixes such as Jr., Sr., II, III that appear after the contact's full name to distinguish between family members.

Stores the primary instant messaging address used by the contact for real-time communications through chat platforms.

Stores an additional instant messaging address for the contact. Useful if the contact uses multiple messaging platforms.

Stores a third instant messaging address for the contact, supporting multiple IM channels for redundancy or alternative communications.

Stores the professional title or designation of the contact within their organization, such as 'Project Manager' or 'Senior Analyst'.

Indicates the name or identifier of the contact's manager or direct supervisor within an organizational hierarchy.

Captures mileage information associated with the contact, typically used for tracking travel distance or expenses related to meetings or visits.

Provides the specific location or address of the contact's office, which can include a room number, building name, or geographic location.

Defines the preferred postal address type for the contact, such as Home, Business, or Other, to determine how mailing-related functions prioritize addresses.

Describes the field of expertise or occupation of the contact, such as 'Engineer', 'Attorney', or 'Educator'.

Contains the name of the contact's spouse or partner, useful for personalizing communication and maintaining relationship context.

Stores the last name or family name of the contact, used in formal correspondence and identification.

Records the wedding anniversary date of the contact, which can be used to personalize messages or reminders.

Indicates whether the contact entry includes an associated image or profile picture file attachment.

Contains the full name of the contact—first and last—spelled using phonetic characters or conventions for pronunciation support.

Represents the phonetic spelling of the contact's first name to assist with proper pronunciation, especially in multilingual environments.

Represents the phonetic spelling of the contact's last name to assist with pronunciation, often used in speech recognition and automated systems.

Contains the contact's email alias, typically a simplified or alternative email identifier used in place of the full address.

Stores additional, free-form information about the contact, such as meeting notes, personal preferences, or context not captured in structured fields.

Contains encoded image data or a file reference that visually represents the contact, commonly displayed in address books or messaging applications.

Contains a Base64-encoded representation of the contact's S/MIME (Secure/Multipurpose Internet Mail Extensions) certificate, used for encrypting and signing email communications.

Holds a serialized value representing the contact's Microsoft Exchange-specific certificate, typically used for secure messaging and client authentication within an Exchange environment.

Stores the unique identifier assigned to the contact in the directory service (such as Active Directory), which enables lookups and integration with enterprise identity systems.

Contains the SMTP email address associated with the mailbox of the contact's manager. This is used in organizational hierarchies to identify supervisory relationships.

Holds a comma-separated list of SMTP email addresses for the contact's direct reports, enabling navigation and mapping of reporting structures within a directory or address book.

Specifies the identifier of the user account to impersonate when performing operations under delegated access. This is commonly used in service scenarios to act on behalf of another user.

Indicates the type of identifier used to locate the impersonation target. Accepted values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

The SMTP address of a shared mailbox whose contact list should be accessed. This allows retrieval of contact records stored in shared or team mailboxes.

Provides a unique identifier assigned to each item stored in the Exchange mailbox database. This identifier is used to retrieve or reference the specific item in operations such as queries, updates, or deletes.

Stores the full MIME content of an email or item, including headers and body, encoded in Base64 format. This representation is commonly used for message transport and interoperability with email systems.

Tracks the version of an item in the Exchange store. This change key is used to detect modifications and helps ensure that concurrent updates do not conflict.

Holds the unique identifier of the folder that directly contains the current item. This enables hierarchy tracking and folder-based item organization in the mailbox.

Tracks the version of the parent folder that contains the current item. Useful for detecting folder-level changes that can impact its contents.

Specifies the message class of the item, which determines its behavior and format. Common classes include IPM.Note for email, IPM.Appointment for calendar events, and others.

Captures the subject line or title of the item, visible in message listings and conversation views. The subject text is limited to a maximum of 255 characters.

Indicates the sensitivity level assigned to the item, which can include values such as Normal, Personal, Private, or Confidential. This setting can restrict how the item is handled or viewed.

Contains the main message content of the item, which can be formatted as plain text, HTML, or Rich Text Format (RTF), depending on how the message was composed or received.

Represents the exact date and time the item was received into the mailbox, based on the server's time zone and configuration. This timestamp is often used for sorting and filtering.

Reflects the total storage size of the item, in bytes, including the message body, attachments, and metadata. This is a read-only value used for quota management and reporting.

Lists one or more user-defined category labels associated with the item. These labels, such as Red Category, Project A, or Follow-Up, help users organize and search their mailbox.

Denotes the relative urgency or priority of the item. Common values include Low, Normal, and High, influencing how the message appears in the user interface or triggers alerts.

Stores the identifier of the item that this message replies to, enabling the reconstruction of message threads and conversations in email clients.

Indicates whether the item has been submitted for delivery and moved to the Outbox. Once submitted, the message enters the transport pipeline for delivery.

True if the item is in draft status, meaning it is composed but has not yet been sent or submitted. Drafts can be reopened and edited before final delivery.

True if the sender of the item is the same as the currently logged-in user, indicating the item was self-addressed or intentionally sent to oneself.

Indicates that the item is a resend of a previously sent message, often used when correcting or updating prior communications.

True if the item remains unchanged since it was created or received. This can be used to detect whether a user or process has edited the item.

Provides a full list of all Internet message headers associated with the item, including technical metadata such as message routing, MIME types, and authentication results. Useful for diagnostics, compliance, and message tracing.

Captures the exact timestamp when the item was sent from the sender's mailbox. This is critical for chronological tracking, delivery auditing, and reporting workflows.

Represents the date and time when the item was originally generated or saved in the Exchange mailbox, regardless of when it was sent or received. Important for tracking lifecycle events of items.

Defines the scheduled date and time when a reminder is expected to alert the user. This value is used in conjunction with ReminderMinutesBeforeStart to determine alert timing.

Indicates whether a reminder is currently enabled for the item. A value of true means a reminder will trigger based on the specified time settings; false means no reminder is set.

Specifies how many minutes prior to the scheduled time of an event the reminder should appear. This value is used to compute the ReminderDueBy time.

Contains the concatenated display names of all recipients in the Cc (carbon copy) field. This value is used for rendering recipient information in user interfaces.

Contains the concatenated display names of all recipients in the To field. Used for rendering main recipient information in email views or message previews.

Indicates whether the item includes one or more file or item attachments. A value of true means at least one attachment is associated with the item.

Identifies the locale setting, such as en-US or fr-FR, that influences how the item's date formats, language, and regional settings are displayed or interpreted.

Specifies the display name associated with the sender of the email message. This value typically reflects the full name configured in the sender's mailbox profile.

Specifies the sender's primary email address, using the Simple Mail Transfer Protocol (SMTP) format. This address is used to route messages and identify the sender.

Indicates the protocol or addressing method used to deliver the message from the sender. Common routing types include SMTP, EX (Exchange), and others depending on the mail system.

Stores the display name of each recipient listed in the 'To' field of the email message. Multiple entries can be present for messages sent to multiple recipients.

Contains the SMTP email address of each recipient in the 'To' field. This value is used to deliver the message to intended recipients.

Stores the unique identifier for each 'To' recipient entry. This identifier links to recipient-specific metadata or associated mailbox items.

Stores the display name of each recipient included in the 'Cc' (carbon copy) field. These recipients receive a visible copy of the message.

Contains the SMTP email address of each carbon copy recipient. These addresses are used to send copies of the message alongside the main recipients.

Stores the unique item identifier associated with each carbon copy recipient entry. This can be used to track or reference related metadata.

Stores the display name of each recipient listed in the 'Bcc' (blind carbon copy) field. These recipients receive a copy of the message without visibility to others.

Contains the SMTP email address of each blind carbon copy recipient. These addresses remain hidden from other recipients of the message.

Stores the unique item identifier for each blind carbon copy recipient entry. This can be used to manage or audit invisible recipient delivery.

Indicates whether the sender has requested a read receipt notification when the recipient opens the message. A value of true prompts the system to send such a notification.

Indicates whether the sender has requested a delivery receipt notification when the message is successfully delivered to the recipient's server. A value of true enables this feature.

Contains a binary-encoded value that represents the hierarchical position of the message within an email conversation thread. This helps group related messages for conversation views.

Captures the subject or main theme of the conversation thread to which the message belongs, helping to group related messages for easier tracking and categorization.

Specifies the display name of the sender whose mailbox initiated the message. This is typically the name shown in the email's From field.

Contains the SMTP (Simple Mail Transfer Protocol) email address of the sender. This value is used to identify the origin of the message at the protocol level.

Specifies the routing type used for the sender's mailbox. Common values include SMTP for internet email and EX for Exchange routing.

Provides a unique identifier for the message generated by the sending server, used to distinguish the message across servers and trace message threads.

Indicates whether the message has been opened or marked as read by the recipient. This is useful for tracking user engagement with the message.

Specifies whether a reply is expected or required for the message. This property can influence user prompts or automated workflows.

Holds the Usenet 'References' header, which includes a list of message IDs from previous related messages, allowing threaded message views and response tracking.

Determines whether the current user or application has permission to create associated items, which are typically hidden metadata items linked to folders.

Indicates whether the user has the right to create new messages or items within the specified folder.

Specifies whether the user has permission to create subfolders under the current folder, enabling hierarchical organization.

Defines whether the user can delete the item or folder, reflecting part of the security and access control model.

Shows whether modifications to the contents or properties of an item or folder are allowed based on current user permissions.

Indicates whether the user has read access to the item or folder. If false, the item or folder contents are restricted.

Specifies whether private items, such as those marked as confidential or restricted, can be viewed by the current user.

Contains the display name of the user who received the message on behalf of another recipient or mailbox rule, often used in delegate scenarios.

Specifies the SMTP email address of the mailbox user who ultimately received the item. This is typically used in scenarios involving delegation or mail forwarding.

Indicates the routing protocol used for delivering the item to the ReceivedBy user. The default and most common value is SMTP, which stands for Simple Mail Transfer Protocol.

Contains the display name of the mailbox user on whose behalf the item was received. This is used in delegate or shared mailbox scenarios.

Provides the SMTP email address of the user on whose behalf the message was received. This is commonly seen in delegated access or shared mailbox contexts.

Specifies the routing type for the ReceivedRepresenting user. The default value is SMTP, indicating the message was routed via Simple Mail Transfer Protocol.

Contains the display name of the user who last modified the item in the Exchange store. Useful for auditing and change tracking.

Indicates the exact timestamp when the item was last updated. This is a read-only field commonly used in synchronization or data freshness logic.

Indicates whether the item is a special hidden item that is associated with a folder, such as rules or views metadata, rather than a standard visible item like a message or event.

Contains a query string fragment to be appended to the Outlook Web App (OWA) URL for rendering the item in read-only mode via a web browser.

Contains a query string fragment to be appended to the Outlook Web App (OWA) URL for rendering the item in edit mode, allowing modifications in a browser session.

Uniquely identifies a conversation thread within the Exchange store. This value can be used to group related messages and items into a single conversation view.

Stores the change key associated with the conversation, which is used to detect updates and maintain consistency during synchronization or updates.

Represents the portion of the message body that is unique to the current item, excluding content from earlier items in the conversation. It can be in HTML or plain-text format.

Specifies the format in which the unique body content is stored. Supported values include HTML and TEXT, indicating rich or plain formatting respectively.

Specifies the notification text for a reminder message. This can include event or task descriptions shown in popup reminders.

Indicates the physical or virtual location associated with the event, meeting, or appointment tied to the reminder message.

Defines the start time of the calendar item or appointment that triggered the reminder. This is used to align the reminder with the event's beginning.

Defines the end time of the calendar item or appointment associated with the reminder, marking when the event is expected to conclude.

Stores the identifier of the calendar entry associated with the reminder. This ID can be used to look up the full calendar item details.

Contains a comma-separated list of attachment identifiers (Ids) related to the item (for example, 'att001, att002, att003').

Specifies the unique identifier of the user being impersonated in the current session. Impersonation is typically used by administrators or applications accessing user mailboxes.

Indicates the identifier type used to specify the impersonated user. Supported types include PrincipalName, SID, PrimarySmtpAddress, SmtpAddress.

Defines the email address of a shared mailbox. Use this to access messages, including Deleted Items, from the context of a shared mailbox rather than an individual user.

Stores the globally unique identifier assigned to each item within the Exchange store. This value is essential for referencing or manipulating the item programmatically.

Contains the original MIME-encoded message content, represented in Base64 binary format. This stream includes headers and body content in its raw email format.

Holds a unique version key that changes whenever the associated item is updated. This key supports synchronization and conflict resolution in Exchange.

References the unique identifier of the folder that contains the item, enabling hierarchical organization and navigation within the mailbox structure.

Captures the version key of the parent folder, used to track folder-level changes such as renaming or moving items within Exchange.

Defines the message class of the item, which determines its type and behavior (such as IPM.Note for email or IPM.Appointment for calendar events).

Specifies the subject line or title of the item. This value is prominently displayed in item previews and is restricted to a maximum of 255 characters.

Indicates how confidential the item is, with possible values including Normal, Personal, Private, and Confidential. This property helps manage visibility and access.

Contains the main content or body of the message in either plain text or HTML format, representing the actual message text authored by the sender.

Captures the precise date and time when the item was received by the mailbox. This timestamp is automatically generated and cannot be edited.

Reflects the total size of the item in bytes, including attachments, body content, and metadata. This is a read-only value used for storage management.

Stores a comma-separated list of user-defined category labels that help classify or tag items for searching and filtering within the mailbox.

Specifies the level of importance assigned to the item, such as Low, Normal, or High, which can influence how the item is displayed or treated by clients.

References the message identifier of the original item that this one replies to, enabling clients to maintain conversation threading.

Indicates whether the item has been submitted to the Outbox and is ready to be sent. This flag helps determine message status within the send workflow.

Identifies whether the item is still in draft status, meaning it has been created or edited but has not yet been sent or submitted.

Flags items that were sent by the mailbox owner to themselves, often used for reminders or self-referenced notes.

Indicates that the current item is a resend of a previously sent message, typically generated by choosing the 'Resend This Message' option.

Shows whether the item has remained unchanged since it was last saved or submitted. This is useful for detecting edits or tampering.

Contains all the Internet message headers for the item, including metadata such as Received, From, Subject, Date, MIME-Version, and Content-Type. Useful for tracing the route and processing of an email item through various mail servers.

Specifies the exact date and time the draft message was sent from the sender's mailbox. This value is set once the item transitions from draft to sent status.

Indicates the date and time when the draft message was initially created in the mailbox, regardless of whether it has been sent or modified afterward.

Denotes the date and time at which a reminder for the draft item is scheduled to trigger. This timestamp works in conjunction with ReminderMinutesBeforeStart to alert users about the item in advance.

A Boolean flag indicating whether a reminder has been configured for the draft message. If true, the system will attempt to notify the user based on the associated reminder settings.

Defines the number of minutes prior to the ReminderDueBy time that the system should trigger a notification. Helps users prepare in advance for time-sensitive messages.

Displays a concatenated string of all recipients listed in the Cc (carbon copy) field, formatted for user interfaces. This value is primarily used for display purposes and does not reflect the internal recipient list structure.

Displays a concatenated string of all recipients listed in the To field, typically shown in the email client UI. It combines the display names of recipients in a user-friendly format.

Indicates whether the draft message includes one or more file attachments. A value of true suggests that the item contains content beyond text or metadata.

Represents the culture or locale setting (such as en-US, fr-FR) associated with the item. This value influences formatting of dates, times, language, and possibly spell-check settings within the message.

Specifies the display name of the user who composed or sent the draft message. This name appears in the From field of the draft and is typically the full name associated with the sender's mailbox account.

Provides the Simple Mail Transfer Protocol (SMTP) email address associated with the sender of the draft message. This is the actual email address used for message routing and delivery.

Indicates the messaging protocol or routing type used for the sender's address. Common values include SMTP for standard email delivery or EX for Exchange-specific addresses. The default routing type is SMTP.

Captures the display name of each primary recipient listed in the 'To' field of the draft message. This name is typically derived from the recipient's user profile or contact information.

Contains the SMTP email address of each recipient listed in the 'To' field of the draft message. This address is used by Exchange to route the message to the correct mailbox.

Stores the internal Exchange identifier for each recipient listed in the 'To' field. This ID is used to reference recipient metadata or related message history within the Exchange system.

Stores the display name of each recipient listed in the 'Cc' (Carbon Copy) field of the draft message. These recipients are secondary recipients who are notified but not expected to respond.

Provides the SMTP email address of each recipient listed in the 'Cc' field. These addresses are included in the draft message for informational purposes.

Holds the Exchange-specific item identifier for each recipient in the 'Cc' field. This ID links the recipient to internal Exchange metadata or conversation threads.

Represents the display name of each recipient listed in the 'Bcc' (Blind Carbon Copy) field. These recipients receive the message without being visible to other recipients.

Specifies the email address of a recipient who is blind carbon copied (Bcc) on the message. This address uses the Simple Mail Transfer Protocol (SMTP) format and is not visible to other recipients.

Stores the unique identifier assigned to the Bcc recipient entry. This identifier is used to associate the recipient with the message within the Exchange store.

Indicates whether the sender has requested a read receipt notification, which alerts the sender when the recipient opens or reads the message.

Indicates whether the sender has requested a delivery receipt, which confirms that the message was successfully delivered to the recipient's mailbox.

Contains a binary-encoded index that identifies the hierarchical relationship of this message within a conversation thread. It is used to group related messages together.

Stores the normalized subject or topic of the conversation thread to which this message belongs. Helps organize and group messages under the same topic.

Displays the display name of the sender, as shown in the 'From' field of the message. This is typically the name associated with the sender's mailbox account.

Holds the SMTP email address of the user who sent the message. This is the address that appears in the 'From' field for email clients and servers.

Indicates the routing protocol used for the 'From' address. Common values include SMTP for internet mail or EX for Exchange-based addresses. The default routing type is SMTP.

Contains the globally unique identifier assigned to the message by the sending email system. This identifier is typically used for message tracking and threading across systems.

Indicates whether the recipient has marked the message as read. This property is updated based on user actions in their email client.

Specifies whether a response is explicitly requested from the recipient. This flag is typically used for meeting requests or messages that require user acknowledgment or action.

Contains the value of the 'References' header in a message, used to link related messages in a conversation or thread, commonly seen in email clients and Usenet discussions.

Indicates whether the current user or client application has permission to create associated items within the folder, such as hidden items used for storing metadata or settings.

Indicates whether the user or application is authorized to create regular content items—such as emails or calendar events—within the folder.

Indicates whether the client has the right to create subfolders or child folders under the current folder, which contributes to building a folder hierarchy structure.

Specifies whether the user or client is permitted to delete items or folders, depending on the current permissions and the type of item being accessed.

Specifies whether the client has permission to change properties or content of a folder or item, such as modifying a message body or updating folder attributes.

Indicates whether the current client or user has read access to the folder or item, allowing viewing of its content and metadata.

Determines whether the user or client is allowed to view items marked as private, such as confidential calendar appointments or messages that have restricted visibility.

Captures the display name of the user who received the message, typically as part of message delivery metadata in Exchange mail flow.

Specifies the Simple Mail Transfer Protocol (SMTP) email address of the mailbox user who physically received the item. This field is useful for identifying the actual recipient when messages are sent on behalf of another user or redirected.

Indicates the routing protocol used for message delivery to the ReceivedBy user. Typical values include SMTP for internet-based email, but other routing types can apply in hybrid or legacy configurations.

Displays the full display name of the user on whose behalf the message was received. This is typically used when one user receives a message on behalf of another, such as in delegated access scenarios.

Specifies the SMTP email address of the user represented by the ReceivedRepresentingName field. This identifies the mailbox that was logically the intended recipient in cases of delegation or representation.

Identifies the routing protocol used for the ReceivedRepresenting user. While the default is SMTP, this field accommodates other routing systems in Exchange hybrid deployments or legacy systems.

Contains the display name of the user who last modified the item, such as a draft or message. This is helpful for tracking changes in collaborative mailbox environments.

Records the timestamp of the last modification made to the item. This read-only field is useful for auditing, synchronization, and understanding the edit history of a message or draft.

Indicates whether the item is associated with a folder as a non-standard message class, such as hidden messages used for folder configuration or rules metadata. A value of true denotes a system or folder-level association.

Provides a query string segment that, when appended to the Outlook Web App (OWA) base URL, constructs a complete link to open and read the item directly in a browser-based email client.

Provides a query string segment that, when appended to the Outlook Web App (OWA) base URL, enables users to open and edit the item through the web interface, facilitating quick message updates.

Represents the unique identifier assigned to a conversation thread within the Exchange store. This ID groups related messages across folders and users, allowing coherent tracking of multi-message discussions.

Stores the unique change key for the conversation or item, which is used to track the version of the object within Exchange and to ensure concurrency control when updating it.

Represents the portion of the message body that is unique to this item, excluding content quoted from previous messages. This content can be formatted as HTML or plain text depending on the UniqueBodyType.

Indicates the format used to store the unique body content. Possible values include HTML and TEXT, which determine how the UniqueBody field is interpreted.

Holds the custom reminder text that is shown to users when a reminder alert is triggered for an associated calendar item or meeting.

Specifies the physical or virtual location where the calendar event, meeting, or associated item will occur, as displayed in the user's calendar view.

Defines the scheduled start time for the calendar item, meeting, or event associated with the reminder message, using the datetime format.

Defines the scheduled end time for the calendar item, meeting, or event associated with the reminder message, using the datetime format.

Contains the unique identifier of the calendar item that the reminder message refers to. This helps in correlating the reminder with the original calendar event.

Lists the identifiers of files attached to the item, separated by commas. Each ID corresponds to a file stored with the item in Exchange, such as, id1, id2, id3.

Represents the identifier of the Exchange user account being impersonated. This is typically used when a service or delegate performs actions on behalf of another user.

Specifies the type of identifier used to perform impersonation. Acceptable values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Provides the email address of a shared mailbox. Use this field when retrieving draft messages that belong to a shared mailbox rather than an individual user.

Uniquely identifies a specific folder within the Exchange store. This identifier is used to track and reference the folder across Exchange services and client applications.

Provides a version-specific identifier for the folder, enabling synchronization systems to detect changes made to the folder's properties or contents since the last retrieval.

Contains the unique identifier of the folder that is the immediate parent of the current folder. This establishes the folder's position within the overall folder hierarchy.

Stores the change key of the parent folder, allowing synchronization and version tracking of changes made to the parent folder.

Specifies the type or classification of the folder, such as IPF.Note for mail folders, IPF.Appointment for calendar folders, or custom values for user-defined folder types.

Holds the user-facing name of the folder, which is typically shown in email clients such as Outlook or Exchange Web Services.

Indicates the total number of items—such as emails, calendar entries, or tasks—currently stored in the folder, regardless of their read or unread state.

Represents the number of subfolders directly nested within this folder. This helps identify folder hierarchy depth and structure.

Specifies whether the folder, particularly if it is a managed folder created by policy, can be deleted by the end user.

Indicates whether the folder can be renamed or relocated by the user. This is often restricted for system or managed folders enforced by retention policies.

Specifies whether a user-facing comment associated with a managed folder must be displayed in the mail client to comply with retention or usage policies.

Indicates whether a storage quota has been applied to the folder, typically in managed folder scenarios for mailbox size control.

True if the folder is designated as the root container for all managed folders within the mailbox, serving as a parent structure for policy-based folders.

Stores the identifier of the managed folder, which is used for policy enforcement, retention tracking, and folder provisioning by administrators.

Contains a textual note or policy comment associated with the folder, often displayed to users to describe folder purpose or retention guidelines.

Defines the maximum allowed storage size for the folder, in kilobytes or megabytes, depending on server configuration. This helps enforce compliance with mailbox management policies.

Represents the total size, in bytes, of all contents within the folder, including messages, calendar items, and attachments. Useful for storage management and quota evaluation.

Specifies the URL that is set as the folder's default home page. Typically used to display custom content or information when accessing the folder through a client interface.

Displays the total number of unread messages or items currently stored in the folder. Helps users and administrators track pending or new content.

Indicates whether the authenticated client has the right to create associated items, which are hidden messages used for storing metadata or settings within the folder.

Indicates whether the authenticated client is permitted to create new messages, events, or other primary content types in the folder.

Indicates whether the authenticated client can create child folders under the current folder, supporting custom folder structures.

Indicates whether the authenticated user or application has permission to delete the folder or its contents. Used for enforcing retention policies and user access controls.

Indicates whether the contents or properties of the folder or its items can be updated by the user. Reflects the user's write or edit permissions.

Indicates whether the user has read access to the folder and its items. Determines whether items are visible in client applications.

Indicates whether the user has permission to view items marked as private within the folder. Typically used in calendar or mailbox sharing scenarios.

Specifies the level of access granted to a user through folder sharing. Values include permissions like Read, Write, Delete, and Owner, which define how shared data can be used.

Contains the display name or identifier of the parent folder that contains the current folder. Helps maintain folder hierarchy relationships.

Specifies the user account to impersonate when performing operations. Used in scenarios where an application needs to act on behalf of another user.

Indicates the type of user identifier used for impersonation. Acceptable values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Defines the scope of folder traversal during search operations. Valid options are Shallow (top-level only), Deep (including all subfolders), and SoftDeleted (recoverable items). Default is Shallow.

Provides the SMTP email address of a shared mailbox whose folders are being accessed. Required when retrieving folders from shared mailboxes.

Token used for pagination in result sets. It identifies the position of the next page of data. Do not set manually; it is system-generated for cursor-based navigation.

Provides the globally unique identifier for an item stored in the Exchange mailbox. This ID is used to retrieve or reference the item in API calls and operations.

Contains the original MIME content of the item, including headers and body, encoded in Base64. This property is essential for interoperability with systems that consume raw email formats.

Identifies the current state or version of the item. Every time the item is updated, this key changes, enabling concurrency control and synchronization processes.

Holds the unique identifier of the folder that contains this item. This is used to establish the item's location within the mailbox folder hierarchy.

Represents the change key of the parent folder, used to detect updates to the folder's state or metadata over time.

Defines the class or type of item, such as IPM.Note for email messages. This value helps applications distinguish between different kinds of Exchange items.

Stores the subject line of the message or item. This string is displayed as the title or heading in the user interface and is limited to 255 characters in length.

Specifies the sensitivity level assigned to the item, such as Normal, Personal, Private, or Confidential. This influences how the item is displayed or shared with others.

Contains the main content of the item, typically the message body. This can be plain text or formatted HTML, depending on the message structure.

Indicates the timestamp when the item was received by the mailbox server. Useful for sorting, filtering, and auditing mailbox content.

Represents the total size of the item, measured in bytes. This includes all headers, body content, and attachments. This field is read-only and reflects the stored size on the server.

Lists one or more user-defined categories assigned to the item, separated by commas. These categories help organize or color-code messages within a mailbox.

Describes the priority level assigned to the item, such as Low, Normal, or High. This field is typically used by email clients to visually distinguish urgent messages.

Holds the identifier of the original message to which this item is a response. Useful for threading messages in a conversation view.

Indicates whether the item has been sent by the sender and submitted to the Outbox folder for delivery processing.

Identifies whether the item is a draft, meaning it has been composed but not yet sent. Used by email clients to save work-in-progress messages.

Specifies whether the current mailbox owner is also the sender of the item. Common in scenarios where users email themselves for reminders or notes.

Indicates that the item has previously been sent and is now being resent. Useful for tracking message resubmissions or forwarding with minimal changes.

Shows whether the item has remained unchanged since it was received or last saved. This is useful for detecting untouched messages.

Contains all Internet message headers associated with the email item, including metadata such as MIME version, content type, encoding, and user agent information. These headers are useful for diagnostics, filtering, and compliance audits.

Specifies the exact date and time the email was sent from the sender's mailbox. This timestamp is critical for chronological sorting, archiving, and determining message latency.

Captures the timestamp when the item was first created in the Exchange mailbox, which can differ from the send or received time. It is often used for tracking draft creation or initial saves.

Indicates the scheduled date and time at which a reminder should be triggered for a calendar item, task, or flagged message. It works in conjunction with the ReminderMinutesBeforeStart field to manage notification timing.

Specifies whether a reminder is configured for the current item. A value of true indicates that the user or system has explicitly set a reminder to alert at a specific time.

Defines how many minutes before the event's start time the reminder will be shown. This setting allows customization of notification lead time for appointments, tasks, or flagged messages.

Stores the combined display names of all recipients listed in the Cc (carbon copy) field. This user-facing string is used in the message header for visual representation.

Stores the combined display names of all recipients listed in the To field. This string is displayed in the message header to reflect primary recipients.

Indicates whether the email item includes one or more file attachments. This field is typically used to filter or flag messages that can contain additional content or documents.

Represents the culture or locale associated with the email item, such as 'en-US' for English (United States). This affects formatting of dates, numbers, and localized content.

Contains the full display name of the sender as presented in the email client. This value is often resolved from the directory or contact card and used for UI presentation.

Stores the email address of the sender in Simple Mail Transfer Protocol (SMTP) format. This is the primary identifier for the originating mailbox.

Defines the protocol used to route the sender's address. Common values include SMTP, EX (for Exchange), or X400. This is useful in hybrid or legacy messaging environments.

Contains the display names of all recipients listed in the To field. These names are derived from contact records or directory services and used in the email client's UI.

Lists the SMTP addresses of all To recipients, separated by commas. This is used for routing the message to each intended recipient.

Stores the unique Exchange item identifiers associated with each To recipient entry, allowing for referencing and relationship tracking within the mailbox store.

Contains the display names of all recipients listed in the Cc (carbon copy) field. These are typically shown in the message header for informational delivery.

Lists the SMTP addresses of all Cc recipients, separated by commas. These addresses are used to deliver informational copies of the message.

Stores the unique item identifiers corresponding to each Cc recipient entry. These identifiers link the recipient metadata with internal Exchange objects.

Represents the display name of a recipient in the Bcc (blind carbon copy) field. Bcc recipients are hidden from other message recipients.

Contains the SMTP address of the Bcc recipient. This field is not visible to other recipients of the message, maintaining confidentiality.

Identifies the unique Exchange store identifier for each recipient listed in the blind carbon copy (Bcc) field of the message. This value enables traceability and programmatic referencing of individual recipients.

Indicates whether the sender explicitly requested a read receipt notification, which informs the sender when the recipient opens the message.

Specifies whether the sender requested a delivery receipt to confirm that the message was successfully delivered to the recipient's mailbox.

Stores a binary value used by Exchange to preserve the hierarchical relationship of messages in a conversation thread, enabling accurate threading and sorting of related messages.

Contains the normalized subject line that identifies the topic of a conversation thread. This value is used for grouping related messages within the same thread.

Displays the display name of the user or entity that sent the message. This is typically shown in email clients as the sender's name.

Contains the SMTP address of the message sender, which uniquely identifies the sender's mailbox on the email server.

Specifies the routing protocol used to deliver the message from the sender. Typically set to 'SMTP', but can support other routing types like 'EX' for Exchange.

Stores the globally unique identifier assigned to the email message by the originating mail server, used for message tracking and threading across systems.

Indicates whether the recipient has opened or viewed the message. A value of true means the message has been marked as read.

Specifies whether the sender is requesting a response from the recipient. This is often used in meeting requests or action-required messages.

Contains one or more Internet message identifiers used to reference previous messages in a thread. This supports message threading and reply association.

Indicates whether the current user or client has permission to create associated items within a folder, typically used for hidden metadata like rules or views.

Specifies whether the client has rights to create new items (such as messages or tasks) in the current folder.

Denotes whether the user or client has permission to create subfolders within the current folder structure.

Indicates whether the client has permission to delete items or folders. A true value means the delete operation is permitted.

Reflects whether the user has permission to modify the contents or properties of the folder or item.

Indicates whether the user has permission to read the contents of a folder or item. A true value allows access to view the item.

Specifies whether the user is authorized to view items marked as private. This typically applies to shared mailboxes or calendars.

Displays the display name of the final recipient to whom the message was delivered. This can differ from the intended recipient in the case of forwarding or delegation.

Contains the SMTP address of the mailbox that ultimately received the message, used for delivery verification and auditing.

Specifies the transport protocol used for message delivery to the ReceivedBy mailbox. Typically set to SMTP, indicating the message was received via standard email routing.

Displays the full name of the user who is being represented as the recipient of the message, allowing for delegation or impersonation tracking.

Specifies the email address of the user represented as the recipient. This is typically used in scenarios where one user sends or receives messages on behalf of another.

Indicates the routing protocol used for the ReceivedRepresenting mailbox, such as SMTP, X500, or others. Defaults to SMTP for standard email addresses.

Provides the display name of the last user who modified the item, useful for auditing changes or determining recent activity.

Captures the date and time of the last modification made to the item. This field is automatically updated by the system and is read-only.

Indicates whether the item is linked to a folder as a hidden or system-level item, such as rules, views, or forms.

Contains a query string to append to the Outlook Web App (OWA) endpoint for rendering the item in read-only mode in a web browser.

Contains a query string to append to the Outlook Web App (OWA) endpoint for launching the item in edit mode through the web interface.

Uniquely identifies a conversation thread, allowing grouping of related messages or calendar items across folders and time.

Represents the version key for the conversation, used to track changes and ensure data consistency across updates.

Provides the message body content that is unique to this item within a conversation, excluding quoted or repeated content from earlier messages.

Specifies the format of the unique body content, either HTML or plain text, determining how it should be rendered in clients.

Contains the message text associated with a calendar reminder, typically shown in pop-up notifications or alerts.

Defines the physical or virtual location associated with a calendar item such as a meeting or event, used for reminders.

Indicates the scheduled start time of the calendar item tied to the reminder, aiding in timely notifications.

Specifies the scheduled end time of the associated calendar event, useful for calculating event duration or availability.

References the calendar item linked to the reminder message, allowing correlation between reminders and their parent events.

Lists the identifiers of files attached to the item, formatted as a comma-separated list. Each Id corresponds to an individual attachment.

Identifies the target user to impersonate during Exchange access operations, enabling scenarios like delegated mailbox access.

Defines the type of identifier used for impersonation, such as PrincipalName, SID, PrimarySmtpAddress, or SmtpAddress.

Specifies the email address of a shared mailbox. Use this to access inbox contents belonging to shared or team mailboxes.

Uniquely identifies the item within the Exchange store. This value can be used to retrieve, update, or delete the item from the store.

Contains the raw email content in Multipurpose Internet Mail Extensions (MIME) format, encoded in Base64. This stream includes headers, body, and attachments as they were originally received.

Provides a unique token that changes whenever the item is modified. Used for concurrency control and to ensure consistency in item synchronization.

Holds the unique identifier of the folder that contains the current item. This allows hierarchical organization of mailbox items.

Contains a unique value that changes whenever the parent folder is modified. It helps in detecting changes at the folder level during synchronization.

Specifies the message class of the item, such as IPM.Note for standard email messages or IPM.Appointment for calendar items. Helps determine item behavior in the client.

Contains the subject line of the item, limited to 255 characters. Used as the main title or summary for the item in user interfaces.

Indicates the sensitivity setting of the item, such as Normal, Personal, Private, or Confidential. This guides how the item should be handled and displayed by clients.

Holds the main text content of the message body. May include HTML or plain text formatting depending on the message composition format.

Captures the exact date and time when the item was delivered to the mailbox. Used for sorting, filtering, and display in message lists.

Reports the total size of the item in bytes, including its body, attachments, and metadata. This property is read-only and useful for storage management.

Lists the categories associated with the item, represented as a collection of strings. Categories help organize and visually tag items in client applications.

Indicates the priority level of the item, typically Low, Normal, or High. This influences how the item is presented and handled by clients.

Contains the identifier of the original message that this item is replying to, facilitating message threading and conversation tracking.

Indicates whether the message has already been submitted to the Outbox folder for delivery. This flag is typically set when an item transitions from draft or compose mode to a state ready for sending.

Specifies whether the item is still in draft status, meaning it has been composed but not yet sent or submitted. Useful for distinguishing incomplete messages from finalized ones.

Determines whether the sender and recipient of the item are the same user. This is commonly used to identify messages a user sends to themselves, either for reminders or testing.

Indicates whether the message is a resend of a previously sent item. This can be used to track repeated attempts to deliver or forward the same content.

Represents whether the item remains unchanged from its original state since creation or receipt. Useful for filtering out items that have been edited or altered.

Contains the full set of Internet-standard headers for the message, such as From, To, Subject, Date, and custom headers. These headers provide transport and metadata information used in message routing and processing.

Captures the exact date and time when the message was sent from the client or mail server. This timestamp reflects when the message left the sender's outbox.

Indicates when the item was originally created in the mailbox. This is typically set when the message is first composed or received.

Specifies the date and time when a reminder is scheduled to be triggered for the item. This is used in conjunction with the ReminderMinutesBeforeStart value to alert users before an event or deadline.

Identifies whether a reminder has been configured for this item. A true value means a user has requested a visual or audible alert prior to a specified time.

Specifies the number of minutes before the start time of a calendar event when a reminder notification should be triggered for the user.

Stores the concatenated display names of all recipients listed in the Cc (carbon copy) field, formatted as a single string suitable for display purposes in user interfaces.

Stores the concatenated display names of all recipients listed in the To field. This value is typically displayed in the message header and is used to identify primary recipients.

Indicates whether the message or calendar item contains any file attachments. A value of true means one or more attachments are present.

Specifies the culture or locale information (such as language and regional settings) associated with the item, which can affect formatting and localization of content.

Contains the display name of the sender who initiated the message or calendar event. This is typically a human-readable name presented in email headers.

Specifies the full email address of the sender, formatted using the Simple Mail Transfer Protocol (SMTP), which is the standard format for email routing.

Identifies the protocol or routing method used to deliver the message from the sender. The default and most common value is SMTP, but other routing types can also be supported.

Contains the individual display names of users listed as primary recipients (To) of the item. This is typically the name shown in the email client for each recipient.

Stores the SMTP email addresses corresponding to the To recipients of the item, ensuring that each recipient can be routed correctly via email systems.

Provides a unique identifier associated with each To recipient in the Exchange store. This is used for internal tracking and relationship mapping.

Contains the display names of users who are copied on the message via the Cc (carbon copy) field, as typically displayed in the message header.

Holds the SMTP email addresses of the recipients listed in the Cc field. These addresses are used for routing copies of the item to additional stakeholders.

Stores the unique identifier for each recipient listed in the Cc (carbon copy) field, enabling linkage to recipient metadata or further recipient details.

Specifies the display name of each recipient listed in the Bcc (blind carbon copy) field, typically shown in mail clients for administrative or logging purposes.

Holds the email address (in SMTP format) of each Bcc recipient, which remains hidden from other message recipients to ensure privacy.

Contains a unique identifier corresponding to each Bcc recipient, used internally to track recipient details and link to message metadata.

Indicates whether the sender has requested a read receipt for the item, which prompts the recipient's client to notify the sender when the message is opened.

Specifies whether the sender has requested a delivery receipt, which confirms that the message was successfully delivered to the recipient's mailbox.

Stores a binary string that maintains the threading hierarchy of the conversation, allowing clients to reconstruct the sequence and nesting of related messages.

Represents the subject or topic line used to group related messages into a conversation thread within the mailbox interface.

Displays the name associated with the sender's mailbox, typically derived from the display name field in the sender's contact or directory profile.

Contains the sender's email address in SMTP format, used to route replies and identify the sender in both headers and user interfaces.

Indicates the protocol or routing method used to send the message. Common values include SMTP for standard email routing and EX for Exchange-based routing.

Stores the globally unique identifier for the message, used for tracking across servers and clients and included in the message's Internet headers.

Marks whether the message has been opened or viewed by the recipient. Useful for user interface indicators and automated workflows that rely on message status.

Specifies whether the sender of the item has requested a response from the recipient. This is often used for meeting requests, tasks, or emails where a reply or confirmation is expected.

Contains the Usenet 'References' header field, which is used to maintain the thread hierarchy by identifying message IDs of previous related messages. This helps email clients organize message threads in conversation view.

Indicates whether the client application has permission to create associated items, which are non-visible metadata objects stored within a folder, such as rules, views, or forms.

Indicates whether the client has the right to create content items such as emails or calendar events within the folder. This is typically controlled by folder-level access rights.

Specifies whether the client has permission to create subfolders within the current folder. This is applicable to folders like the mailbox root or custom folders.

Determines if the client has the necessary permissions to delete the folder or its contained items. This includes both soft delete (move to Deleted Items) and hard delete actions.

Indicates whether the client is authorized to make changes to the folder or item, such as updating its properties or modifying content like message body or attachments.

Specifies whether the client is permitted to read the folder or item contents. This includes access to message headers, body text, and item metadata.

Indicates whether the client has permission to view items marked as private, such as calendar entries or tasks that are hidden from general view by default.

Captures the display name of the user or mailbox that received the item. This value is derived from the mailbox or directory profile associated with the recipient.

Stores the full SMTP address of the mailbox that received the item. This address is used for routing the message through the email infrastructure.

Indicates the routing type used for delivering the message to the ReceivedBy recipient. Common values include SMTP (Simple Mail Transfer Protocol), EX (Exchange), or X400.

Defines the display name of the user or mailbox that the message was received on behalf of. This is often used when messages are sent to shared or delegated mailboxes.

Specifies the SMTP (Simple Mail Transfer Protocol) email address of the mailbox user on whose behalf the message was received. This is typically used in delegated mailbox scenarios.

Indicates the type of routing used for the ReceivedRepresenting mailbox user, such as SMTP or EX. The default is SMTP, which refers to standard email routing over the internet.

Contains the display name of the user who most recently modified the item. This helps track authorship or recent activity related to the item content or metadata.

Stores the timestamp of the most recent modification made to the item, including updates to properties or content. This field is read-only and system-generated.

Indicates whether the item is an associated item within a folder. Associated items are not visible in standard folder views and are used for storing folder-level data such as rules or forms.

Provides a relative URL query string that should be appended to the base Outlook Web App (OWA) endpoint to open the item in read-only mode via the web interface.

Provides a relative URL query string to append to the Outlook Web App endpoint to open the item in edit mode, allowing web-based updates to item contents.

Represents the unique identifier for a conversation thread in the Exchange store. This allows grouping of messages and items that belong to the same discussion.

Contains the current change key for the conversation, which is used to identify the version of the conversation object and detect modifications.

Holds a segment of the message body that is unique to this message, excluding quoted replies or forwarded content. It can be formatted in either HTML or plain text.

Specifies the format used to store the unique body content of the item. Valid values typically include HTML and TEXT, depending on the message format.

Provides the custom text message shown in a reminder for the associated calendar event or appointment. This message typically appears in reminder notifications.

Indicates the physical or virtual location where the associated meeting or appointment is scheduled to occur, as stored in the reminder message data.

Captures the scheduled start time of the event or appointment that triggered the reminder, enabling accurate display and tracking of upcoming calendar items.

Captures the scheduled end time of the event or appointment that the reminder references. This helps define the full duration of the calendar item.

Stores the unique identifier of the calendar item (meeting, appointment, etc.) that the reminder is associated with, linking the reminder data back to the main calendar entry.

Contains a comma-separated list of the identifiers (Ids) for all files attached to the email item (for example, 'att123, att456, att789').

Specifies the identifier of the user account being impersonated in the current session. This enables delegated access to retrieve mailbox or item data on behalf of another user.

Indicates the identifier type used to define the impersonation target. Valid values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Specifies the email address of a shared mailbox. When set, this allows retrieval of Junk Email items from the specified shared mailbox rather than the default user mailbox.

Stores the globally unique identifier assigned to an individual item within the Exchange store. This ID allows the item to be retrieved, modified, or referenced in programmatic operations.

Contains the original MIME content of the email item, including headers and body, encoded in Base64. This field preserves the raw message structure for transport or forensic analysis.

Represents a version-specific key for the item that changes whenever the item is modified. It is used to detect and resolve concurrency conflicts in synchronization or update scenarios.

Identifies the folder that directly contains the item. This ID links the item to its hierarchical position in the mailbox folder structure.

Indicates the change key for the folder that contains the item. It is used to track folder-level updates for synchronization purposes.

Defines the message class of the item, such as IPM.Note for emails or IPM.Appointment for calendar entries. Determines how Exchange and Outlook interpret and render the item.

Specifies the subject line of the message or item. This is typically a short summary or title, limited to 255 characters, displayed prominently in email clients.

Indicates the sensitivity level assigned to the item, such as Normal, Personal, Private, or Confidential. This helps clients determine how to display or restrict access to the item.

Contains the main message body text of the item, including any formatting or markup. This can include HTML or plain text depending on how the message was composed.

Captures the exact timestamp of when the item was received by the Exchange server. Useful for sorting, filtering, or time-based analytics.

Reflects the total size of the item in bytes, including headers, body, and attachments. This field is read-only and supports mailbox quota enforcement.

Lists one or more categories assigned to the item, represented as a collection of strings. Categories help users group and color-code items for organizational purposes.

Denotes the sender-assigned importance level of the item, typically Low, Normal, or High. Clients often use this to visually prioritize items in the UI.

Holds the ID of the message to which this item is replying. This helps clients thread conversations by linking related messages.

Indicates whether the item has been submitted to the Outbox folder for delivery. True if the item is in the process of being sent, false otherwise.

Specifies whether the item is currently a draft. A value of true means the message has not been finalized or sent.

Indicates whether the item was sent by the mailbox owner to themselves. Helps distinguish internal copies or reminders.

Identifies whether the item is a re-sent version of a previously sent message. Useful for tracking resend scenarios or message retries.

States whether the item remains unchanged from its original saved version. A value of true indicates no edits or updates have been made.

Contains the full set of Internet message headers associated with the email item, including standard headers such as From, To, Subject, and custom headers that provide metadata about the message routing and transmission.

Indicates the precise date and time when the email message was successfully sent from the sender's mailbox. This timestamp is typically recorded by the Exchange server.

Records the exact date and time when the email item was initially created in the mailbox, whether as a draft or during composition.

Specifies the exact time an associated reminder is due to trigger. This value is used in conjunction with the reminder lead time to calculate the notification schedule for calendar or task items.

Specifies whether a reminder has been explicitly enabled for the email or calendar item. A value of true means a reminder is configured to alert the user.

Defines the number of minutes before the scheduled event or due time that a reminder alert is set to appear, helping users anticipate upcoming appointments or deadlines.

Displays a comma-separated list of display names for recipients included in the Cc (carbon copy) field. This is a user-readable string shown in the email header.

Displays a comma-separated list of display names for recipients included in the To field of the message. This field provides a readable summary of primary recipients.

Indicates whether the item includes one or more file attachments. This value is true if any type of attachment—such as documents, images, or embedded items—is present.

Specifies the culture setting (language and regional format) applied to the item. Common values include en-US for English (United States) or fr-FR for French (France), influencing date formats, time zones, and other locale-specific behaviors.

Contains the display name of the individual or mailbox that sent the message. This name typically corresponds to the full name associated with the sender's account.

Stores the SMTP email address of the sender. This is the actual routing address used for message delivery, such as [email protected].

Specifies the routing protocol used to identify the sender's mailbox. Common values include SMTP (Simple Mail Transfer Protocol) and X.400. This determines how the sender's address is interpreted and processed during message delivery.

Represents the display name of each primary recipient in the 'To' field of the outgoing message. This name is typically visible to all recipients and reflects the address book entry or manually entered name.

Provides the SMTP (Simple Mail Transfer Protocol) address associated with each recipient listed in the 'To' field of the message. This is the actual delivery address used for routing the email.

Contains the unique item identifier assigned to each 'To' recipient entry. This ID is used internally by the system to reference the recipient object within the Exchange store.

Indicates the display name of each recipient included in the 'Cc' (carbon copy) field of the message. These recipients receive a visible copy of the message without being the primary audience.

Stores the SMTP address for each recipient listed in the 'Cc' field of the email message. This is the address used to deliver the message copy to secondary recipients.

Identifies each 'Cc' recipient using a unique item ID within the Exchange system. This identifier facilitates recipient tracking and message linkage within the store.

Captures the display name of each recipient included in the 'Bcc' (blind carbon copy) field. Bcc recipients receive a copy of the message without being visible to other recipients.

Holds the SMTP address of each recipient in the 'Bcc' field of the email message. This address is used for hidden delivery, meaning other recipients are unaware of the Bcc addresses.

Holds the unique identifier for each recipient included in the Bcc (blind carbon copy) field of the message. This allows for tracking or querying of Bcc recipients associated with a specific item.

Indicates whether the sender has requested a read receipt notification for the message. A read receipt alerts the sender when the recipient has opened the message.

Indicates whether the sender has requested a delivery receipt for the message. A delivery receipt confirms the message has been successfully delivered to the recipient's email server.

Stores a binary-formatted string that helps preserve the order and hierarchy of messages in a conversation thread. It is used by clients to visually group related messages.

Contains the subject or main topic used to group messages into a conversation thread. Typically derived from the original message subject and used for organizing related communications.

Specifies the display name of the sender as it appears in the From field of the message. This can differ from the sender's email address or user ID.

Provides the sender's email address in Simple Mail Transfer Protocol (SMTP) format, as listed in the From field of the message.

Indicates the routing protocol used for the From mailbox, such as SMTP, EX, or X400. The default and most common value is SMTP.

Contains the globally unique Internet message identifier assigned to the email. This identifier is used to track and correlate messages across systems.

Specifies whether the message has been marked as read by the recipient. This status is typically managed by the mail client and reflects user interaction.

Specifies whether the sender of the message has requested a response from recipients. This flag is typically used to determine if the message is a meeting request, voting option, or other actionable item that expects feedback.

Contains the value of the 'References' Internet message header, which is used by messaging systems to group replies with the original message for conversation threading and context.

Indicates whether the current user has the permission to create associated items within a folder. Associated items are typically hidden metadata used for custom forms or settings.

Indicates whether the current user has the permission to create new items, such as messages or calendar entries, within the contents of a folder.

Indicates whether the current user has the permission to create subfolders under the current folder, thereby altering the folder hierarchy.

Specifies whether the user has delete permissions on the folder or item. This includes both hard and soft deletions, depending on system configuration and user role.

Denotes whether the user has permissions to modify the content or properties of the folder or item, including renaming or updating metadata.

Specifies whether the user has read access to the folder or item. This permission allows the user to view contents but not modify them.

Indicates whether the user is allowed to view items marked as private within a folder. This is typically reserved for users with delegate or administrative access.

Represents the display name of the mailbox user on whose behalf the message was received. This is commonly used in delegated scenarios where a message is received by someone acting on behalf of another.

Specifies the SMTP (Simple Mail Transfer Protocol) address of the mailbox user who ultimately received the message. This helps identify the final recipient in email routing scenarios.

Indicates the routing protocol used to deliver the message to the ReceivedBy mailbox. Common values include SMTP, which is the default method for email transmission.

Displays the full name of the user on whose behalf the message was received. This is used in delegated or shared mailbox scenarios where a user receives mail representing another.

Provides the SMTP address of the user for whom the message was received. This is typically used in delegate access configurations.

Indicates the routing protocol (such as SMTP) used for the ReceivedRepresenting mailbox. This helps in correctly identifying the transport method used in delegated receipt cases.

Shows the display name of the last user who made a change to the item. Useful for auditing and change tracking.

Captures the timestamp of the most recent modification made to the item. This value is system-generated and read-only.

Specifies whether the item is an associated item, meaning it is linked to a folder but not visible in the standard folder item view. Associated items typically include hidden metadata or configuration elements.

Provides a query string to append to the Outlook Web App endpoint URL to open the item in read-only mode. This enables direct linking to items for viewing in a browser.

Provides a query string to append to the Outlook Web App endpoint URL to open the item in edit mode. This is used to launch the item for editing in a web browser session.

Uniquely identifies a conversation thread in the Exchange store, allowing grouping of related messages under a single conversation ID.

Stores the versioning change key for the conversation or item. This is used internally by Exchange to detect updates or conflicts when synchronizing data.

Represents the portion of the email body that is unique to this message within the conversation thread. This is typically the content authored by the sender, excluding quoted replies or forwards from previous messages. It can be in either HTML or plain-text format.

Specifies the format in which the unique body content is stored for this item. Accepted values are 'HTML' and 'TEXT', indicating whether the unique body is rendered as rich HTML content or as plain text.

Defines the custom text displayed in the reminder pop-up or notification associated with a calendar event, task, or flagged email. This field is often used to convey critical instructions or notes to the recipient.

Identifies the physical or virtual location linked to a calendar-based item such as a meeting or appointment. It can include room names, addresses, or conference call links, and is intended to guide participants to the correct venue.

Indicates the scheduled start time of the item that triggered the reminder, typically associated with a meeting, appointment, or flagged message. The time is stored in datetime format to support precise scheduling.

Indicates the scheduled end time of the item tied to the reminder. It is relevant for events and tasks that have a defined duration and is used for tracking and scheduling purposes.

Stores the unique identifier of the calendar event that the reminder message data refers to. This ID allows systems to locate and manage the corresponding calendar item across different Exchange entities.

Contains a comma-separated list of the identifiers (IDs) for any files or objects attached to the message. Each ID references a specific attachment stored in the Exchange system. The format for the list is ID1, ID2, ID3, ...

Indicates the identifier of the user account being impersonated when accessing mailbox items through delegated access. This allows administrative or service-level accounts to act on behalf of a specified user.

Specifies the format used to identify the impersonated user. Supported values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress, each representing a different identifier type within Exchange or Active Directory.

Specifies the email address of a shared mailbox whose outbox items are being accessed. This is useful when retrieving sent items that originate from a shared resource rather than an individual user account.

Uniquely identifies an item within the Exchange store. This value remains constant for the item's lifetime and is used to retrieve or manipulate the item programmatically.

Contains the raw MIME stream of the email message, encoded in Base64. This includes headers, body content, and attachments as formatted by the email client.

Provides a unique version identifier for the item. It changes each time the item is updated and is required for concurrency control and synchronization.

Specifies the unique identifier of the folder that directly contains the item. This value is used to determine the item's hierarchical location in the mailbox.

Identifies the current version of the parent folder. Used in synchronization and conflict detection to track changes to the parent container.

Indicates the message type of the item, such as IPM.Note for standard emails or IPM.Appointment for calendar entries. Helps determine item handling rules.

Contains the subject line of the item, often displayed as the email title. Limited to 255 characters to ensure compatibility with various clients and services.

Describes how confidential the item is. Possible values include Normal, Personal, Private, and Confidential, which can restrict how the message is displayed or forwarded.

Stores the full content of the message body, either as plain text or HTML. Includes the main communication content that users compose and read.

Captures the exact timestamp when the item was delivered to the recipient's mailbox. Used for sorting and time-based filtering.

Represents the total size of the item in bytes, including headers, body, and attachments. This property is read-only and used to track mailbox usage.

Lists the custom category labels assigned to the item by the user. These are used for color-coding, organization, and filtering within email clients.

Indicates the priority level assigned to the item by the sender. Common values include Low, Normal, and High, affecting how the message is presented.

References the item Id of the original message being replied to. Helps maintain message threading and conversation grouping.

True if the item has been submitted to the Outbox and is awaiting transmission. Used internally by Exchange to track delivery state.

True if the item is a draft that has not yet been sent or submitted. Drafts are typically saved manually or automatically during message composition.

True if the sender and recipient are the same mailbox. Useful for detecting self-addressed messages or automated copies.

Indicates whether the item is a re-sent version of a previously sent message. Helps differentiate between original sends and retries.

True if the item has not been changed since it was first received or created. Helps detect user edits or processing updates.

Holds the complete set of Internet-standard message headers as a single string. This includes metadata like 'Received', 'From', 'To', 'Message-ID'.

Marks the date and time when the message was successfully sent from the Outbox. Often used in audits or delivery confirmation.

Stores the creation timestamp of the item. This is when the message was first drafted or system-generated within the mailbox.

Specifies the exact time a reminder is due to alert the user, based on the event's scheduled time and any configured offset.

True if the user has configured a reminder for this item, prompting alerts prior to a deadline, meeting, or task.

Specifies how many minutes before a scheduled calendar event a reminder will trigger and display to the user. This setting helps users manage upcoming commitments effectively.

Contains the formatted string of all display names listed in the Cc (carbon copy) field of the email. Useful for rendering the message's visual representation in client applications.

Contains the formatted string of all display names listed in the To field of the email. This field reflects how primary recipients are visually presented in the user interface.

Indicates whether the email message or item includes one or more file or item attachments. A value of true means attachments are present, allowing downstream processes to handle them accordingly.

Specifies the cultural or locale information associated with the item, such as language and regional settings, typically used for proper formatting of dates, times, and other locale-sensitive content.

Represents the full display name of the sender as configured in the sender's mailbox or directory entry. This name is typically shown in email clients.

Provides the SMTP email address of the sender, enabling clients and services to identify and reply to the message originator.

Specifies the messaging routing protocol used to send the item from the sender, such as SMTP. This helps distinguish between various transport mechanisms in multi-protocol environments.

Contains the list of display names for all primary (To) recipients of the message, presented in a single, comma-separated string.

Lists the SMTP email addresses of all primary recipients (To) in a comma-separated string, enabling external processing or delivery validation.

Provides the unique item identifiers for each primary recipient listed in the To field. These IDs can be used to retrieve additional metadata or link with related objects.

Contains the list of display names for all recipients included in the Cc field. Useful for email display formatting and recipient recognition.

Lists the SMTP email addresses of all Cc recipients in a comma-separated format, supporting both UI display and backend processing.

Provides the unique item identifiers for each recipient listed in the Cc field. These identifiers are useful for tracking and cross-referencing recipients programmatically.

Contains the list of display names for all recipients in the Bcc (blind carbon copy) field. These names are typically not visible to regular recipients but can be processed for audit or delivery purposes.

Lists the SMTP email addresses of all Bcc recipients, separated by commas. This field is critical for systems that track delivery while preserving recipient privacy.

Stores the unique identifier for each recipient listed in the blind carbon copy (Bcc) field of the sent message. This allows for tracking and auditing of hidden recipients.

Specifies whether the sender has requested a read receipt notification, which informs them when the recipient opens the message.

Indicates whether the sender has requested a delivery receipt, confirming that the message was successfully delivered to the recipient's mailbox.

Contains a system-generated binary value that uniquely identifies the conversation thread to which this message belongs, allowing for message threading and grouping in clients like Outlook.

Holds the subject or topic of the conversation thread, used to logically group related email messages into discussions or chains.

Displays the display name of the sender's email account, representing the human-readable name associated with the From address.

Captures the email address (in SMTP format) of the user who sent the message, used for routing and reply functionality.

Specifies the addressing type used to route the sender's email address. Typical values include SMTP, X500, or EX. The default is SMTP.

Stores the globally unique message identifier assigned to the email by the sending system. This ID is used for message correlation and referencing across mail systems.

Indicates whether the message has been marked as read by the recipient. This value is typically updated by the email client upon opening the message.

Determines whether the sender expects a response to the message, often used in meeting requests or actionable messages.

Contains the value of the 'References' header from the message, which is used to maintain threading by linking replies to the original message and prior responses.

Indicates whether the user has permission to create associated content items in the folder, such as hidden metadata or custom forms.

Indicates whether the user has rights to create new mail items or content within the folder represented by the current context.

Indicates whether the user has permission to create new subfolders within the current folder, contributing to the overall mailbox hierarchy.

Indicates whether the current client has permission to delete the associated folder or item. This is part of the effective access rights granted to the user.

Specifies whether the user has permission to modify the content or properties of the associated folder or item.

Indicates whether the client is authorized to read the contents of the specified folder or item. This is a key aspect of user access control.

Determines whether the client has been granted permission to view items marked as private within a folder, such as confidential calendar events.

Displays the full name of the user whose mailbox ultimately received the item. This is typically the final recipient's display name.

Specifies the Simple Mail Transfer Protocol (SMTP) address of the mailbox that received the item. Used for identifying the recipient in email tracking.

Defines the routing protocol used to deliver the item to the ReceivedBy user. Common values include SMTP for email routing or EX for Exchange.

Shows the display name of the delegate or mailbox user on whose behalf the item was received, if applicable.

Specifies the SMTP address of the user whom the delegate or automated process is representing in the transaction.

Indicates the message routing type used for the user being represented. The default is SMTP, but other values such as EX (Exchange) can appear.

Captures the display name of the last user who made changes to the item. Useful for audit tracking and versioning.

Records the timestamp of the most recent modification made to the item. This field is automatically set and read-only.

Specifies whether the item is an associated item within the folder. Associated items are hidden from the user interface and typically store metadata or configuration.

Provides a query string to append to the Outlook Web App (OWA) endpoint that opens the item in read-only mode via a browser.

Provides a query string to append to the Outlook Web App (OWA) endpoint that opens the item in edit mode for modification via a browser.

Uniquely identifies the conversation thread to which the item belongs within the Exchange mailbox. Used to group related messages together.

Stores the change key associated with the conversation or item. This key is used for concurrency control and versioning.

Contains the portion of the message body that is unique to the item and not duplicated from previous messages in the conversation thread. May be in HTML or plain text.

Indicates the format in which the unique body content is stored, such as 'HTML' or 'TEXT'. Helps determine how to render the body.

Represents the text message shown in a reminder notification for calendar events or tasks. It often includes a summary of the event.

Specifies the location information tied to the reminder event, such as a meeting room, virtual meeting link, or geographic address.

Captures the start time of the event linked to the reminder message. This is used to trigger reminders in calendar-based scenarios.

Captures the end time of the event linked to the reminder message. Together with StartTime, this defines the event duration.

Identifies the calendar item (appointment or meeting) that the reminder message is associated with. Useful for linking to the calendar event.

Lists the identifiers of attachments associated with the item, separated by commas. Each identifier corresponds to a file or embedded object.

Specifies the identifier of the user account to impersonate during the API call or query. Allows operations to be performed as that user.

Defines the format of the impersonation identifier. Supported types include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Specifies the email address of a shared mailbox. Use this to access or query the sent items associated with that shared mailbox.

Uniquely identifies the item within the Exchange store. This value is immutable and used to retrieve or reference the item programmatically. It is a read-only system-generated identifier.

Stores the MIME-encoded content of the item in Base64 format, preserving the original structure and encoding used for email transmission. This is useful for interoperability with external mail systems.

Contains the change key that reflects the version of the item. It updates whenever the item is modified, allowing clients to detect and handle concurrent changes. This property is read-only.

Identifies the folder in which the item resides by its unique ID. This enables clients to organize or retrieve items based on their container folder. This value is read-only.

Represents the change key for the parent folder, which changes when the folder's metadata or content changes. Used to ensure consistency in folder-level operations. This property is read-only.

Specifies the message class of the item, which determines how the item is processed by Exchange and client applications. Common values include IPM.Task for tasks and IPM.Note for emails.

Holds the text that appears as the subject or title of the item. This is displayed prominently in user interfaces and limited to 255 characters to maintain compatibility with clients.

Defines the sensitivity of the item, such as Normal, Personal, Private, or Confidential. This value can be used to control visibility in shared mailbox scenarios.

Contains the main content or description of the task. This field supports plain text or HTML, depending on the message format, and is used to convey task details to users.

Captures the timestamp when the item was received in the mailbox. For tasks, this can reflect the creation time or synchronization timestamp from an external system.

Indicates the total size of the item in bytes, including attachments and message headers. Useful for storage management and quota enforcement. This property is read-only.

Represents a list of user-defined tags or labels assigned to the item. These categories help organize and group items in the mailbox for easier filtering and reporting.

References the item Id of the message to which this item is a response, supporting threaded conversations and message correlation in task discussions.

Returns true if the item has been submitted to the Outbox for sending. This typically applies to messages or meeting requests generated from a task.

Indicates whether the item is still in draft status, meaning it has been saved but not sent or finalized. Drafts can be reopened and edited.

Returns true if the sender of the item is the same as the mailbox owner, which can be used to identify self-addressed tasks or test messages.

Specifies whether the item was a resend of a previous message or task. Useful for tracking duplicates or repeated submissions.

Indicates whether the item has remained unchanged since it was last retrieved. Helpful in sync scenarios to detect stale or untouched records.

Contains all Internet message headers for the item, such as MIME headers and custom transport headers, allowing inspection of routing, origin, and metadata related to the message.

Stores the exact date and time when the item, such as a task request or message, was sent from the originating mailbox.

Records the timestamp indicating when the task or item was initially created in the Exchange system, which can differ from the send or received time.

Specifies the date and time when a reminder notification is scheduled to appear, typically used for upcoming task deadlines or important events.

Indicates whether a reminder has been enabled for this item. If true, the Exchange client will alert the user at the specified time.

Defines how many minutes in advance of the due time the reminder should trigger. This helps users receive alerts ahead of key deadlines.

Displays the concatenated display names of recipients listed in the Cc field of the message. This is a read-only string used for rendering the UI.

Shows the concatenated display names of all primary recipients in the To field. This is primarily used for displaying message recipients in user interfaces.

Indicates whether the task or item includes one or more file or item attachments. A true value implies that attachments are present.

Represents the locale and language setting (culture code) associated with the item, such as en-US or fr-FR, which can influence formatting and localization.

Captures the total amount of time, in minutes, that has been reported as spent working on the task. This value can be used for tracking task progress.

Records the date and time when the task was officially assigned to a recipient, often used to calculate task duration or aging.

Stores billing-related metadata associated with the task, such as charge codes or client references used for internal cost tracking.

Tracks the number of times the task has been modified. Each update to the task typically increments this counter, helping with versioning or synchronization.

Lists the names of companies associated with the task. Multiple columns (Companies1, Companies2, Companies3) are used to support multiple entries due to schema design.

Additional field for listing company names associated with the task. Used when the number of related companies exceeds the capacity of a single field.

Third field for listing companies related to the task, allowing extended support for multiple organization associations.

Specifies the date and time when the task was marked as completed. This timestamp is important for workflow tracking and reporting.

Contains the first group of contact names or identifiers associated with the task, often used for tracking stakeholders or collaborators.

Provides a secondary list of associated contacts for the task, continuing from Contacts1 if more contacts are present.

Extends the list of task-associated contacts beyond Contacts1 and Contacts2, supporting a broader range of linked individuals or entities.

Indicates the current status of a delegated task, such as whether it has been accepted, declined, or still pending. This helps track the task's lifecycle within a delegation workflow.

Specifies the display name or identifier of the user who assigned the task to someone else, providing insight into the task's origin and accountability chain.

Defines the deadline by which the task should be completed. This is used for scheduling, reminders, and task prioritization.

Indicates whether the assignee can modify the task's properties, such as its subject, due date, or completion status. This is relevant in shared or delegated task scenarios.

Shows whether the task has been marked as completed by the user or system. This is used for filtering and reporting on task progress.

Identifies whether the task is configured to repeat at regular intervals. Useful for tasks that must be completed on a recurring basis, such as weekly reports or monthly reviews.

Indicates whether the task is assigned to a team rather than an individual, helping differentiate between personal and collaborative responsibilities.

Stores mileage information associated with the task, typically used for expense tracking or travel-related activities logged through the task system.

Represents the user who owns or created the task. This is often the task originator and can differ from the assignee in delegated scenarios.

Reflects the progress of the task as a percentage value between 0.0 and 100.0, enabling incremental tracking and visual indicators of task status.

Specifies the recurrence pattern type for the task, such as daily, weekly, monthly, or yearly, defining how often the task repeats.

The allowed values are RelativeYearlyRecurrence, AbsoluteYearlyRecurrence, RelativeMonthlyRecurrence, AbsoluteMonthlyRecurrence, WeeklyRecurrence, DailyRecurrence, DailyRegeneration, WeeklyRegeneration, MonthlyRegeneration, YearlyRegeneration.

Lists the days of the week (for example, Monday, Wednesday, Friday) on which the task is scheduled to recur. Used in weekly and monthly recurrence rules.

Indicates which instance of the day is used in the recurrence, such as 'first', 'second', or 'last' Monday of the month. Relevant for relative recurrence rules.

The allowed values are First, Second, Third, Fourth, Last.

Specifies the month in which an annually recurring task occurs. Supports scheduling events like yearly audits or anniversaries.

Defines the specific day of the month (1–31) on which the task recurs, commonly used in monthly and yearly recurrence rules.

Represents the frequency interval between recurring task occurrences. For example, a value of 2 with a weekly recurrence means every two weeks.

Defines which day is considered the start of the week (for example, Sunday or Monday), affecting weekly recurrence patterns and calendar alignment.

Describes how long the recurrence pattern lasts, such as whether it is bounded by a number of occurrences or an end date.

The allowed values are NoEndRecurrence, EndDateRecurrence, NumberedRecurrence.

Indicates the start date from which the recurrence pattern begins, marking the first occurrence of the repeating task or event.

Indicates the date on which the recurrence pattern ends, beyond which no additional task instances will be created.

Specifies the total number of instances for a recurring task. This helps determine how many times the task should repeat based on its recurrence pattern.

Defines the date and time at which the task is scheduled to begin. This is typically used to track when work on the task should commence.

Indicates the current progress state of the task, such as NotStarted, InProgress, Completed, WaitingOnOthers, or Deferred.

Provides a human-readable explanation of the task's status, offering more detail than the categorical status field.

Represents the estimated amount of work, in minutes, that is expected to complete the task. This is useful for workload planning and reporting.

Indicates whether the current user or application has permission to create associated items, such as hidden items used internally by applications.

Specifies whether the user has the right to add new content (for example, tasks or items) to the folder.

Indicates if the user has the ability to create subfolders within the current folder hierarchy.

Denotes whether the user is allowed to delete this item or folder. This can be restricted based on permissions or item state.

Specifies whether the user is authorized to make modifications to this item or folder.

Indicates if the item or folder is readable by the user, which is fundamental to access and view permissions.

Specifies whether the user can view items that have been marked as private within the folder.

Displays the name of the last user who modified the task. This helps identify who last made changes for auditing or tracking purposes.

Records the date and time when the task item was last changed. Useful for identifying the most recent updates.

Indicates whether the item is an associated item, which typically means it is not visible in the folder's content view but is used for system or background operations.

Provides the query string segment to append to the Outlook Web App (OWA) base URL to generate a link for reading the task in a browser interface.

Supplies the query string segment used to construct a link for editing the task directly in Outlook Web App (OWA).

Stores the unique identifier that links this item to a conversation thread. Useful for grouping related items together.

Holds the change key associated with the conversation or item, which helps detect version changes and maintain synchronization.

Contains the portion of the message body that is unique to this item, excluding any repeated content from previous items in the conversation. Can be in HTML or plain text.

Specifies the format used to store the unique body content, such as HTML or plain text, allowing applications to render it appropriately.

Specifies the identifier of the user to impersonate when accessing Exchange data. This is used in delegated access scenarios where one account acts on behalf of another.

Defines the type of user identifier provided for impersonation. Supported values include PrincipalName, SID, PrimarySmtpAddress, and SmtpAddress.

Specifies the email address of a shared mailbox. Used to query task data from a shared Exchange mailbox context.

The default value is true.