The CData Sync App provides a straightforward way to continuously pipeline your Azure Synapse data to any database, data lake, or data warehouse, making it easily available for Analytics, Reporting, AI, and Machine Learning.
The Azure Synapse connector can be used from the CData Sync application to pull data from Azure Synapse and move it to any of the supported destinations.
The Sync App enables connectivity to Azure Synapse through the TDS protocol.
Data is transferred to Azure Synapse via the upload of CSV data to Azure Blob, which is then copied to Azure Synapse.
For required properties, see the Settings tab.
For connection properties that are not typically required, see the Advanced tab.
In addition to providing authentication (see below), set the following properties to connect to a Azure Synapse database:
Authenticate to Azure Synapse as described in the following sections.
Note: Microsoft has rebranded Azure AD as Entra ID. In topics that require the user to interact with the Entra ID Admin site, we use the same names Microsoft does. However, there are still CData connection properties whose names or values reference "Azure AD".
Microsoft Entra ID is a multi-tenant, cloud-based identity and access management platform. It supports OAuth-based authentication flows that enable the driver to access Azure Synapse endpoints securely.
Authentication to Entra ID via a web application always requires that you first create and register a custom OAuth application. This enables your application to define its own redirect URI, manage credential scope, and comply with organization-specific security policies.
For full instructions on how to create and register a custom OAuth application, see Creating an Entra ID (Azure AD) Application.
After setting AuthScheme to AzureAD, the steps to authenticate vary, depending on the environment. For details on how to connect from desktop applications, web-based workflows, or headless systems, see the following sections..
Note: Microsoft has rebranded Azure AD as Entra ID. In topics that require the user to interact with the Entra ID Admin site, we use the same names Microsoft does. However, there are still CData connection properties whose names or values reference "Azure AD".
Service principals are security objects within a Microsoft Entra ID (Azure AD) application that define what that application can do within a specific tenant.
Service principals are created in the Entra admin center, also accessible through the Azure portal.
As part of the creation process we also specify whether the service principal will access Entra resources via a client secret or a certificate.
Depending on the service you are connecting to, a tenant administrator may need to enable Service Principal authentication or assign the Service Principal to the appropriate roles or security groups.
Instead of being tied to a particular user, service principal permissions are based on the roles assigned to them. These roles determine which resources the application can access and which operations it can perform.
When authenticating using a service principal, you must register an application with an Entra tenant, as described in Creating a Service Principal App in Entra ID (Azure AD).
This subsection describes properties you must set before you can connect. These vary, depending on whether you will authenticate via a client secret or a certificate.
If you are running Azure Synapse on an Azure VM and want to automatically obtain Managed Service Identity (MSI) credentials to connect, set AuthScheme to AzureMSI.
If your VM has multiple user-assigned managed identities, you must also specify OAuthClientId.
To authenticate directly to Azure Active Directory using your Azure credentials, specify the following connection properties:
This section details a selection of advanced features of the Azure Synapse Sync App.
Use SSL Configuration to adjust how Sync App handles TLS/SSL certificate negotiations. You can choose from various certificate formats;. For further information, see the SSLServerCert property under "Connection String Options" .
Configure the Sync App for compliance with Firewall and Proxy, including Windows proxies. You can also set up tunnel connections.
To enable TLS, set Encrypt to True.
With this configuration, the Sync App attempts to negotiate TLS with the server. The server certificate is validated against the default system trusted certificate store. You can override how the certificate gets validated using the SSLServerCert connection property.
To specify another certificate, see the SSLServerCert connection property.
The Azure Synapse Sync App also supports setting client certificates. Set the following to connect using a client certificate.
Set the following properties:
Stored procedures are function-like interfaces that extend the functionality of the Sync App beyond simple SELECT/INSERT/UPDATE/DELETE operations with Azure Synapse.
Stored procedures accept a list of parameters, perform their intended function, and then return any relevant response data from Azure Synapse, along with an indication of whether the procedure succeeded or failed.
| Name | Description |
Fetches the OAuth Access Token, which is used to authenticate and authorize API calls made to Azure Synapse.
| Name | Type | Description |
| AuthMode | String | Specifies the type of authentication mode to use when obtaining an OAuth token. The options include 'App' for desktop applications and 'Web' for web applications.
The allowed values are APP, WEB. The default value is APP. |
| Verifier | String | Azure Synapse provides the code verifier after user authorization. This value is sent as a query parameter to the callback URL. |
| Scope | String | Defines the permissions to request during authentication. For 'OAuthGrantType=CODE,' provide a space-separated list of desired scopes. For 'OAuthGrantType=CLIENT,' the default scope is 'https://graph.microsoft.com/.default,' which uses the permissions that are already assigned to your application.
The default value is https://database.windows.net//.default offline_access. |
| CallbackUrl | String | The URL to which the authentication service redirects the user's browser after authorization is complete. This must match the Reply URL configured in the Azure Synapse Directory application settings. |
| State | String | A optional string that the client application can use to maintain state between the request and callback. This value is returned after the authentication roundtrip and helps verify the integrity of the request. |
| Prompt | String | Determines how the user is prompted during authentication. Options include 'select_account' (default), 'none' (no prompt), 'login' (force the user to log in), and 'consent' (request the user to grant permissions). |
| Name | Type | Description |
| OAuthAccessToken | String | The OAuth Access Token used to authenticate API requests with Azure Synapse. |
| OAuthRefreshToken | String | The OAuth Refresh Token is used to obtain a new access token when the current one expires. |
| ExpiresIn | String | Indicates the remaining lifetime of the access token in seconds. A value of -1 indicates the token does not expire. |
Retrieves the OAuth Authorization URL, allowing the client to direct the user's browser to the authorization server and initiate the OAuth process.
| Name | Type | Description |
| CallbackURL | String | The URL where users are redirected after successfully authorizing your application must match the Reply URL set in the Azure Synapse application settings for proper redirection. |
| Scope | String | A list of space-separated permissions or scopes requested from users during authorization. For OAuthGrantType='CODE', these are the user-facing scopes. For OAuthGrantType='CLIENT', use 'https://graph.microsoft.com/.default' to utilize preconfigured application permissions.
The default value is https://database.windows.net//.default. |
| State | String | A unique string value used to maintain the state between your authorization request and its response. This is useful for preventing cross-site request forgery (CSRF) attacks and identifying user sessions. |
| Prompt | String | Specifies the behavior of user authentication. The default setting is 'select_account', which prompts the user to choose an account. The 'none' option skips this prompt, while 'login' requires the user to re-enter their credentials. The 'consent' option displays a permissions consent screen. |
| Name | Type | Description |
| Url | String | The generated authorization URL enables users to authenticate and grant access to the application via their web browser. |
Refreshes an expired OAuth Access Token to maintain continuous authenticated access to Azure Synapse resources without requiring reauthorization from the user.
| Name | Type | Description |
| OAuthRefreshToken | String | The OAuth Refresh Token obtained during the initial authorization is used to request a new access token when the original one has expired. |
| Name | Type | Description |
| OAuthAccessToken | String | The newly issued OAuth Access Token from Azure Synapse, required for authenticating subsequent API requests. |
| OAuthRefreshToken | String | The updated OAuth Refresh Token can renew the access token after it expires. |
| ExpiresIn | String | Indicates the amount of time, in seconds, until the newly issued access token expires. |
The connection string properties are the various options that can be used to establish a connection. This section provides a complete list of the options you can configure in the connection string for this provider. Click the links for further details.
For more information on establishing a connection, see Establishing a Connection.
| Property | Description |
| AuthScheme | Specifies which authentication scheme the driver uses when it establishes the connection. |
| Server | Specifies the fully-qualified host name or IP address of the provider SQL endpoint. You must supply a value for the connection to succeed. |
| User | Specifies the authenticating user's user ID. |
| Password | Specifies the authenticating user's password. |
| Port | Specifies the TCP port that the provider uses when it connects to the provider SQL endpoint. |
| Database | Specifies the name of the Azure Synapse SQL database that the provider connects to at login. |
| Encrypt | Specifies whether the provider negotiates TLS/SSL encryption with the Azure Synapse endpoint and, if so, how strictly it enforces certificate validation. |
| Property | Description |
| BatchMode | Specifies the mechanism the provider uses when it performs BulkInsert operations. |
| StorageAccountLocation | Specifies the Azure Blob Storage container that the provider uses to stage data files when the BatchMode property is set to COPY. |
| AzureSASToken | Specifies the URL-encoded Shared Access Signature (SAS) token that the provider uses when staging files in Azure Blob Storage. |
| Property | Description |
| AzureTenant | Identifies the Azure Synapse tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID. |
| AzureEnvironment | Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added. |
| Property | Description |
| OAuthClientId | Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication. |
| OAuthClientSecret | Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.). |
| Scope | Specifies the scope of the authenticating user's access to the application, to ensure they get appropriate access to data. If a custom OAuth application is needed, this is generally specified at the time the application is created. |
| Property | Description |
| OAuthJWTCert | Supplies the name of the client certificate's JWT Certificate store. |
| OAuthJWTCertType | Identifies the type of key store containing the JWT Certificate. |
| OAuthJWTCertPassword | Provides the password for the OAuth JWT certificate used to access a password-protected certificate store. If the certificate store does not require a password, leave this property blank. |
| OAuthJWTCertSubject | Identifies the subject of the OAuth JWT certificate used to locate a matching certificate in the store. Supports partial matches and the wildcard '*' to select the first certificate. |
| Property | Description |
| SSLClientCert | Specifies the TLS/SSL client certificate store for SSL Client Authentication (2-way SSL). This property works in conjunction with other SSL-related properties to establish a secure connection. |
| SSLClientCertType | Specifies the type of key store containing the TLS/SSL client certificate for SSL Client Authentication. Choose from a variety of key store formats depending on your platform and certificate source. |
| SSLClientCertPassword | Specifes the password required to access the TLS/SSL client certificate store. Use this property if the selected certificate store type requires a password for access. |
| SSLClientCertSubject | Specifes the subject of the TLS/SSL client certificate to locate it in the certificate store. Use a comma-separated list of distinguished name fields, such as CN=www.server.com, C=US. The wildcard * selects the first certificate in the store. |
| SSLServerCert | Specifies the certificate to be accepted from the server when connecting using TLS/SSL. |
| Property | Description |
| FirewallType | Specifies the protocol the provider uses to tunnel traffic through a proxy-based firewall. |
| FirewallServer | Identifies the IP address, DNS name, or host name of a proxy used to traverse a firewall and relay user queries to network resources. |
| FirewallPort | Specifies the TCP port to be used for a proxy-based firewall. |
| FirewallUser | Identifies the user ID of the account authenticating to a proxy-based firewall. |
| FirewallPassword | Specifies the password of the user account authenticating to a proxy-based firewall. |
| Property | Description |
| LogModules | Specifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged. |
| Property | Description |
| Location | Specifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path. |
| BrowsableSchemas | Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC . |
| Tables | Optional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC . |
| Views | Optional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC . |
| Property | Description |
| CustomizeDateFormat | Specifies the text pattern the provider uses when it parses or writes DATE values. |
| ApplicationIntent | Specifies whether the connection requests a read-write or read-only session when connecting through an Availability Group listener. |
| EnableTransaction | Specifies whether the provider wraps data-modification statements in SQL transactions. |
| IncludeSystemSchemas | Specifies whether the provider returns objects that reside in system schemas including guest, sys, INFORMATION_SCHEMA, and any schema whose name begins with db_. |
| IncludeTableTypes | Specifies whether the provider retrieves the object type (table or view) for each entry it returns during metadata queries. |
| MaxRows | Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY. |
| Other | Specifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues. |
| QueryPassthrough | This option passes the query to the Azure Synapse server as is. |
| Timeout | Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error. |
This section provides a complete list of the Authentication properties you can configure in the connection string for this provider.
| Property | Description |
| AuthScheme | Specifies which authentication scheme the driver uses when it establishes the connection. |
| Server | Specifies the fully-qualified host name or IP address of the provider SQL endpoint. You must supply a value for the connection to succeed. |
| User | Specifies the authenticating user's user ID. |
| Password | Specifies the authenticating user's password. |
| Port | Specifies the TCP port that the provider uses when it connects to the provider SQL endpoint. |
| Database | Specifies the name of the Azure Synapse SQL database that the provider connects to at login. |
| Encrypt | Specifies whether the provider negotiates TLS/SSL encryption with the Azure Synapse endpoint and, if so, how strictly it enforces certificate validation. |
Specifies which authentication scheme the driver uses when it establishes the connection.
Azure Synapse supports the following AuthScheme options:
Specifies the fully-qualified host name or IP address of the provider SQL endpoint. You must supply a value for the connection to succeed.
Provide the exact host name shown in Sync App Studio or the Azure portal. If the workspace uses a private link, application gateway, or proxy, enter that front-end address instead.
This property is useful when you manage multiple workspaces across environments (for example: dev, test, prod). Setting this property explicitly keeps connection strings self-documenting and prevents accidental cross-environment queries.
Specifies the authenticating user's user ID.
The authenticating server requires both User and Password to validate the user's identity.
Specifies the authenticating user's password.
The authenticating server requires both User and Password to validate the user's identity.
Specifies the TCP port that the provider uses when it connects to the provider SQL endpoint.
The port of the Server hosting the Synapse Database.
If your Sync App workspace listens on the standard port, leave this property at its default. Set a different port only when a firewall rule, load balancer, or proxy exposes the service on a non-standard port number.
This property is useful when your network team remaps 1433 to another port for security or when multiple SQL services share the same public IP.
Specifies the name of the Azure Synapse SQL database that the provider connects to at login.
This property specifies the name of the Azure Synapse database running on the specified Server.
If your workspace contains more than one database or pool, set this property to the exact database name shown in Synapse Studio. Doing so guarantees that every command starts in the correct context and avoids wrong-database errors.
Leaving the field blank is acceptable in single-database workspaces since you can also switch later with a USE <dbName> statement, but declaring the database up front is safer and makes connection strings self-documenting.
Specifies whether the provider negotiates TLS/SSL encryption with the Azure Synapse endpoint and, if so, how strictly it enforces certificate validation.
When this property is set to True, the Sync App requests an encrypted channel and validates the server’s certificate against the operating-system trust store. If the server presents a certificate that is not signed by a public certificate authority, you can supply its thumbprint by setting SSLServerCert.
When this property is set to Strict, the Sync App both requires encryption and enforces stronger checks: it rejects self-signed or weak certificates and prevents protocol downgrades. This mode aligns with Microsoft’s guidance for "strict encryption," making SQL Server traffic easier to secure and inspect with modern network appliances.
When this property is set to False, the Sync App skips TLS negotiation and sends traffic in clear text which is useful only for isolated networks or troubleshooting.
This property is helpful when you must balance security requirements against compatibility. True or Strict satisfy enterprise encryption policies, while False can diagnose handshake issues before you re-enable encryption.
This section provides a complete list of the Bulk properties you can configure in the connection string for this provider.
| Property | Description |
| BatchMode | Specifies the mechanism the provider uses when it performs BulkInsert operations. |
| StorageAccountLocation | Specifies the Azure Blob Storage container that the provider uses to stage data files when the BatchMode property is set to COPY. |
| AzureSASToken | Specifies the URL-encoded Shared Access Signature (SAS) token that the provider uses when staging files in Azure Blob Storage. |
Specifies the mechanism the provider uses when it performs BulkInsert operations.
Choose the mode that best fits your environment, permissions, and performance goals:
This property is helpful when you need to trade off speed, network constraints, and security policies: picking the right mode can cut minutes—or even hours—from large loads while letting you work within the permissions and infrastructure you actually control.
Specifies the Azure Blob Storage container that the provider uses to stage data files when the BatchMode property is set to COPY.
If this property is left blank and BatchMode is set to COPY, the Sync App cannot stage files and the load fails. When you supply a value, the driver uploads CSV/Parquet files to the specified container and then executes a COPY INTO statement that reads directly from those files.
Provide the full HTTPS URL. For example: https://myaccount.blob.core.windows.net/myblobcontainer. In this example, "myaccount" is your Azure Blob account name and "myblobcontainer" is the container you want to use.
This property is useful when you want the highest-throughput loads available in COPY mode or when you need to separate staging storage from the Sync App workspace’s default data lake for security or cost-allocation reasons.
Specifies the URL-encoded Shared Access Signature (SAS) token that the provider uses when staging files in Azure Blob Storage.
Leave this field blank if you authenticate to storage with a different method such as a storage access key or Azure AD credentials.
To create a suitable token in the Azure portal:
The token must stay valid and carry the selected permissions until every bulk-load job completes. Otherwise uploads will fail with permission or expiry errors.
This section provides a complete list of the Azure Authentication properties you can configure in the connection string for this provider.
| Property | Description |
| AzureTenant | Identifies the Azure Synapse tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID. |
| AzureEnvironment | Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added. |
Identifies the Azure Synapse tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID.
A tenant is a digital container for your organization's users and resources, managed through Microsoft Entra ID (formerly Azure AD). Each tenant is associated with a unique directory ID, and often with a custom domain (for example, microsoft.com or contoso.onmicrosoft.com).
To find the directory (tenant) ID in the Microsoft Entra Admin Center, navigate to Microsoft Entra ID > Properties and copy the value labeled "Directory (tenant) ID".
This property is required in the following cases:
You can provide the tenant value in one of two formats:
Specifying the tenant explicitly ensures that the authentication request is routed to the correct directory, which is especially important when a user belongs to multiple tenants or when using service principal–based authentication.
If this value is omitted when required, authentication may fail or connect to the wrong tenant. This can result in errors such as unauthorized or resource not found.
Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added.
Required if your Azure account is part of a different network than the Global network, such as China, USGOVT, or USGOVTDOD.
This section provides a complete list of the OAuth properties you can configure in the connection string for this provider.
| Property | Description |
| OAuthClientId | Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication. |
| OAuthClientSecret | Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.). |
| Scope | Specifies the scope of the authenticating user's access to the application, to ensure they get appropriate access to data. If a custom OAuth application is needed, this is generally specified at the time the application is created. |
Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication.
This property is required in two cases:
(When the driver provides embedded OAuth credentials, this value may already be provided by the Sync App and thus not require manual entry.)
OAuthClientId is generally used alongside other OAuth-related properties such as OAuthClientSecret and OAuthSettingsLocation when configuring an authenticated connection.
OAuthClientId is one of the key connection parameters that need to be set before users can authenticate via OAuth. You can usually find this value in your identity provider’s application registration settings. Look for a field labeled Client ID, Application ID, or Consumer Key.
While the client ID is not considered a confidential value like a client secret, it is still part of your application's identity and should be handled carefully. Avoid exposing it in public repositories or shared configuration files.
For more information on how this property is used when configuring a connection, see Establishing a Connection.
Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.).
This property (sometimes called the application secret or consumer secret) is required when using a custom OAuth application in any flow that requires secure client authentication, such as web-based OAuth, service-based connections, or certificate-based authorization flows. It is not required when using an embedded OAuth application.
The client secret is used during the token exchange step of the OAuth flow, when the driver requests an access token from the authorization server. If this value is missing or incorrect, authentication fails with either an invalid_client or an unauthorized_client error.
OAuthClientSecret is one of the key connection parameters that need to be set before users can authenticate via OAuth. You can obtain this value from your identity provider when registering the OAuth application.
Notes:
For more information on how this property is used when configuring a connection, see Establishing a Connection
Specifies the scope of the authenticating user's access to the application, to ensure they get appropriate access to data. If a custom OAuth application is needed, this is generally specified at the time the application is created.
Scopes are set to define what kind of access the authenticating user will have; for example, read, read and write, restricted access to sensitive information. System administrators can use scopes to selectively enable access by functionality or security clearance.
When InitiateOAuth is set to GETANDREFRESH, you must use this property if you want to change which scopes are requested.
When InitiateOAuth is set to either REFRESH or OFF, you can change which scopes are requested using either this property or the Scope input.
This section provides a complete list of the JWT OAuth properties you can configure in the connection string for this provider.
| Property | Description |
| OAuthJWTCert | Supplies the name of the client certificate's JWT Certificate store. |
| OAuthJWTCertType | Identifies the type of key store containing the JWT Certificate. |
| OAuthJWTCertPassword | Provides the password for the OAuth JWT certificate used to access a password-protected certificate store. If the certificate store does not require a password, leave this property blank. |
| OAuthJWTCertSubject | Identifies the subject of the OAuth JWT certificate used to locate a matching certificate in the store. Supports partial matches and the wildcard '*' to select the first certificate. |
Supplies the name of the client certificate's JWT Certificate store.
The OAuthJWTCertType field specifies the type of the certificate store specified in OAuthJWTCert. If the store is password-protected, use OAuthJWTCertPassword to supply the password..
OAuthJWTCert is used in conjunction with the OAuthJWTCertSubject field in order to specify client certificates. If OAuthJWTCert has a value, and OAuthJWTCertSubject is set, the CData Sync App initiates a search for a certificate. For further information, see OAuthJWTCertSubject.
Designations of certificate stores are platform-dependent.
Notes
Identifies the type of key store containing the JWT Certificate.
| Value | Description | Notes |
| USER | A certificate store owned by the current user. | Only available in Windows. |
| MACHINE | A machine store. | Not available in Java or other non-Windows environments. |
| PFXFILE | A PFX (PKCS12) file containing certificates. | |
| PFXBLOB | A string (base-64-encoded) representing a certificate store in PFX (PKCS12) format. | |
| JKSFILE | A Java key store (JKS) file containing certificates. | Only available in Java. |
| JKSBLOB | A string (base-64-encoded) representing a certificate store in Java key store (JKS) format. | Only available in Java. |
| PEMKEY_FILE | A PEM-encoded file that contains a private key and an optional certificate. | |
| PEMKEY_BLOB | A string (base64-encoded) that contains a private key and an optional certificate. | |
| PUBLIC_KEY_FILE | A file that contains a PEM- or DER-encoded public key certificate. | |
| PUBLIC_KEY_BLOB | A string (base-64-encoded) that contains a PEM- or DER-encoded public key certificate. | |
| SSHPUBLIC_KEY_FILE | A file that contains an SSH-style public key. | |
| SSHPUBLIC_KEY_BLOB | A string (base-64-encoded) that contains an SSH-style public key. | |
| P7BFILE | A PKCS7 file containing certificates. | |
| PPKFILE | A file that contains a PPK (PuTTY Private Key). | |
| XMLFILE | A file that contains a certificate in XML format. | |
| XMLBLOB | Astring that contains a certificate in XML format. | |
| BCFKSFILE | A file that contains an Bouncy Castle keystore. | |
| BCFKSBLOB | A string (base-64-encoded) that contains a Bouncy Castle keystore. |
Provides the password for the OAuth JWT certificate used to access a password-protected certificate store. If the certificate store does not require a password, leave this property blank.
This property specifies the password needed to open a password-protected certificate store. To determine if a password is necessary, refer to the documentation or configuration for your specific certificate store.
Identifies the subject of the OAuth JWT certificate used to locate a matching certificate in the store. Supports partial matches and the wildcard '*' to select the first certificate.
The value of this property is used to locate a matching certificate in the store. The search process works as follows:
You can set the value to '*' to automatically select the first certificate in the store. The certificate subject is a comma-separated list of distinguished name fields and values. For example: CN=www.server.com, OU=test, C=US, [email protected].
Common fields include:
| Field | Meaning |
| CN | Common Name. This is commonly a host name like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |
If a field value contains a comma, enclose it in quotes. For example: "O=ACME, Inc.".
This section provides a complete list of the SSL properties you can configure in the connection string for this provider.
| Property | Description |
| SSLClientCert | Specifies the TLS/SSL client certificate store for SSL Client Authentication (2-way SSL). This property works in conjunction with other SSL-related properties to establish a secure connection. |
| SSLClientCertType | Specifies the type of key store containing the TLS/SSL client certificate for SSL Client Authentication. Choose from a variety of key store formats depending on your platform and certificate source. |
| SSLClientCertPassword | Specifes the password required to access the TLS/SSL client certificate store. Use this property if the selected certificate store type requires a password for access. |
| SSLClientCertSubject | Specifes the subject of the TLS/SSL client certificate to locate it in the certificate store. Use a comma-separated list of distinguished name fields, such as CN=www.server.com, C=US. The wildcard * selects the first certificate in the store. |
| SSLServerCert | Specifies the certificate to be accepted from the server when connecting using TLS/SSL. |
Specifies the TLS/SSL client certificate store for SSL Client Authentication (2-way SSL). This property works in conjunction with other SSL-related properties to establish a secure connection.
This property specifies the client certificate store for SSL Client Authentication. Use this property alongside SSLClientCertType, which defines the type of the certificate store, and SSLClientCertPassword, which specifies the password for password-protected stores. When SSLClientCert is set and SSLClientCertSubject is configured, the driver searches for a certificate matching the specified subject.
Certificate store designations vary by platform. On Windows, certificate stores are identified by names such as MY (personal certificates), while in Java, the certificate store is typically a file containing certificates and optional private keys.
The following are designations of the most common User and Machine certificate stores in Windows:
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |
| SPC | Software publisher certificates. |
For PFXFile types, set this property to the filename. For PFXBlob types, set this property to the binary contents of the file in PKCS12 format.
Specifies the type of key store containing the TLS/SSL client certificate for SSL Client Authentication. Choose from a variety of key store formats depending on your platform and certificate source.
This property determines the format and location of the key store used to provide the client certificate. Supported values include platform-specific and universal key store formats. The available values and their usage are:
| USER - default | For Windows, this specifies that the certificate store is a certificate store owned by the current user. Note that this store type is not available in Java. |
| MACHINE | For Windows, this specifies that the certificate store is a machine store. Note that this store type is not available in Java. |
| PFXFILE | The certificate store is the name of a PFX (PKCS12) file containing certificates. |
| PFXBLOB | The certificate store is a string (base-64-encoded) representing a certificate store in PFX (PKCS12) format. |
| JKSFILE | The certificate store is the name of a Java key store (JKS) file containing certificates. Note that this store type is only available in Java. |
| JKSBLOB | The certificate store is a string (base-64-encoded) representing a certificate store in JKS format. Note that this store type is only available in Java. |
| PEMKEY_FILE | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| PEMKEY_BLOB | The certificate store is a string (base64-encoded) that contains a private key and an optional certificate. |
| PUBLIC_KEY_FILE | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| PUBLIC_KEY_BLOB | The certificate store is a string (base-64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| SSHPUBLIC_KEY_FILE | The certificate store is the name of a file that contains an SSH-style public key. |
| SSHPUBLIC_KEY_BLOB | The certificate store is a string (base-64-encoded) that contains an SSH-style public key. |
| P7BFILE | The certificate store is the name of a PKCS7 file containing certificates. |
| PPKFILE | The certificate store is the name of a file that contains a PuTTY Private Key (PPK). |
| XMLFILE | The certificate store is the name of a file that contains a certificate in XML format. |
| XMLBLOB | The certificate store is a string that contains a certificate in XML format. |
| BCFKSFILE | The certificate store is the name of a file that contains an Bouncy Castle keystore. |
| BCFKSBLOB | The certificate store is a string (base-64-encoded) that contains a Bouncy Castle keystore. |
Specifes the password required to access the TLS/SSL client certificate store. Use this property if the selected certificate store type requires a password for access.
This property provides the password needed to open a password-protected certificate store. This property is necessary when using certificate stores that require a password for decryption, as is often recommended for PFX or JKS type stores.
If the certificate store type does not require a password, for example USER or MACHINE on Windows, this property can be left blank. Ensure that the password matches the one associated with the specified certificate store to avoid authentication errors.
Specifes the subject of the TLS/SSL client certificate to locate it in the certificate store. Use a comma-separated list of distinguished name fields, such as CN=www.server.com, C=US. The wildcard * selects the first certificate in the store.
This property determines which client certificate to load based on its subject. The Sync App searches for a certificate that exactly matches the specified subject. If no exact match is found, the Sync App looks for certificates containing the value of the subject. If no match is found, no certificate is selected.
The subject should follow the standard format of a comma-separated list of distinguished name fields and values. For example, CN=www.server.com, OU=Test, C=US. Common fields include the following:
| Field | Meaning |
| CN | Common Name. This is commonly a host name like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |
Note: If any field contains special characters, such as commas, the value must be quoted. For example: CN="Example, Inc.", C=US.
Specifies the certificate to be accepted from the server when connecting using TLS/SSL.
If you are using a TLS/SSL connection, use this property to specify the TLS/SSL certificate to be accepted from the server. If you specify a value for this property, all other certificates that are not trusted by the machine are rejected.
This property can take the following forms:
| Description | Example |
| A full PEM Certificate (example shortened for brevity) | -----BEGIN CERTIFICATE----- MIIChTCCAe4CAQAwDQYJKoZIhv......Qw== -----END CERTIFICATE----- |
| A path to a local file containing the certificate | C:\cert.cer |
| The public key (example shortened for brevity) | -----BEGIN RSA PUBLIC KEY----- MIGfMA0GCSq......AQAB -----END RSA PUBLIC KEY----- |
| The MD5 Thumbprint (hex values can also be either space- or colon-separated) | ecadbdda5a1529c58a1e9e09828d70e4 |
| The SHA1 Thumbprint (hex values can also be either space- or colon-separated) | 34a929226ae0819f2ec14b4a3d904f801cbb150d |
Note: It is possible to use '*' to signify that all certificates should be accepted, but due to security concerns this is not recommended.
This section provides a complete list of the Firewall properties you can configure in the connection string for this provider.
| Property | Description |
| FirewallType | Specifies the protocol the provider uses to tunnel traffic through a proxy-based firewall. |
| FirewallServer | Identifies the IP address, DNS name, or host name of a proxy used to traverse a firewall and relay user queries to network resources. |
| FirewallPort | Specifies the TCP port to be used for a proxy-based firewall. |
| FirewallUser | Identifies the user ID of the account authenticating to a proxy-based firewall. |
| FirewallPassword | Specifies the password of the user account authenticating to a proxy-based firewall. |
Specifies the protocol the provider uses to tunnel traffic through a proxy-based firewall.
A proxy-based firewall (or proxy firewall) is a network security device that acts as an intermediary between user requests and the resources they access. The proxy accepts the request of an authenticated user, tunnels through the firewall, and transmits the request to the appropriate server.
Because the proxy evaluates and transfers data backets on behalf of the requesting users, the users never connect directly with the servers, only with the proxy.
The following table provides port number information for each of the supported protocols.
| Protocol | Default Port | Description |
| TUNNEL | 80 | The port where the Sync App opens a connection to Azure Synapse. Traffic flows back and forth via the proxy at this location. |
| SOCKS4 | 1080 | The port where the Sync App opens a connection to Azure Synapse. SOCKS 4 then passes theFirewallUser value to the proxy, which determines whether the connection request should be granted. |
| SOCKS5 | 1080 | The port where the Sync App sends data to Azure Synapse. If the SOCKS 5 proxy requires authentication, set FirewallUser and FirewallPassword to credentials the proxy recognizes. |
Identifies the IP address, DNS name, or host name of a proxy used to traverse a firewall and relay user queries to network resources.
A proxy-based firewall (or proxy firewall) is a network security device that acts as an intermediary between user requests and the resources they access. The proxy accepts the request of an authenticated user, tunnels through the firewall, and transmits the request to the appropriate server.
Because the proxy evaluates and transfers data backets on behalf of the requesting users, the users never connect directly with the servers, only with the proxy.
Specifies the TCP port to be used for a proxy-based firewall.
A proxy-based firewall (or proxy firewall) is a network security device that acts as an intermediary between user requests and the resources they access. The proxy accepts the request of an authenticated user, tunnels through the firewall, and transmits the request to the appropriate server.
Because the proxy evaluates and transfers data backets on behalf of the requesting users, the users never connect directly with the servers, only with the proxy.
Identifies the user ID of the account authenticating to a proxy-based firewall.
A proxy-based firewall (or proxy firewall) is a network security device that acts as an intermediary between user requests and the resources they access. The proxy accepts the request of an authenticated user, tunnels through the firewall, and transmits the request to the appropriate server.
Because the proxy evaluates and transfers data backets on behalf of the requesting users, the users never connect directly with the servers, only with the proxy.
Specifies the password of the user account authenticating to a proxy-based firewall.
A proxy-based firewall (or proxy firewall) is a network security device that acts as an intermediary between user requests and the resources they access. The proxy accepts the request of an authenticated user, tunnels through the firewall, and transmits the request to the appropriate server.
Because the proxy evaluates and transfers data backets on behalf of the requesting users, the users never connect directly with the servers, only with the proxy.
This section provides a complete list of the Logging properties you can configure in the connection string for this provider.
| Property | Description |
| LogModules | Specifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged. |
Specifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged.
The Sync App writes details about each operation it performs into the logfile specified by the Logfile connection property.
Each of these logged operations are assigned to a themed category called a module, and each module has a corresponding short code used to labels individual Sync App operations as belonging to that module.
When this connection property is set to a semicolon-separated list of module codes, only operations belonging to the specified modules are written to the logfile. Note that this only affects which operations are logged moving forward and doesn't retroactively alter the existing contents of the logfile. For example: INFO;EXEC;SSL;META;
By default, logged operations from all modules are included.
You can explicitly exclude a module by prefixing it with a "-". For example: -HTTP
To apply filters to submodules, identify them with the syntax <module name>.<submodule name>. For example, the following value causes the Sync App to only log actions belonging to the HTTP module, and further refines it to exclude actions belonging to the Res submodule of the HTTP module: HTTP;-HTTP.Res
Note that the logfile filtering triggered by the Verbosity connection property takes precedence over the filtering imposed by this connection property. This means that operations of a higher verbosity level than the level specified in the Verbosity connection property are not printed in the logfile, even if they belong to one of the modules specified in this connection property.
The available modules and submodules are:
| Module Name | Module Description | Submodules |
| INFO | General Information. Includes the connection string, product version (build number), and initial connection messages. |
|
| EXEC | Query Execution. Includes execution messages for user-written SQL queries, parsed SQL queries, and normalized SQL queries. Success/failure messages for queries and query pages appear here as well. |
|
| HTTP | HTTP protocol messages. Includes HTTP requests/responses (including POST messages), as well as Kerberos related messages. |
|
| WSDL | Messages pertaining to the generation of WSDL/XSD files. | — |
| SSL | SSL certificate messages. |
|
| AUTH | Authentication related failure/success messages. |
|
| SQL | Includes SQL transactions, SQL bulk transfer messages, and SQL result set messages. |
|
| META | Metadata cache and schema messages. |
|
| FUNC | Information related to executing SQL functions. |
|
| TCP | Incoming and outgoing raw bytes on TCP transport layer messages. |
|
| FTP | Messages pertaining to the File Transfer Protocol. |
|
| SFTP | Messages pertaining to the Secure File Transfer Protocol. |
|
| POP | Messages pertaining to data transferred via the Post Office Protocol. |
|
| SMTP | Messages pertaining to data transferred via the Simple Mail Transfer Protocol. |
|
| CORE | Messages relating to various internal product operations not covered by other modules. | — |
| DEMN | Messages related to SQL remoting. | — |
| CLJB | Messages about bulk data uploads (cloud job). |
|
| SRCE | Miscellaneous messages produced by the product that don't belong in any other module. | — |
| TRANCE | Advanced messages concerning low-level product operations. | — |
This section provides a complete list of the Schema properties you can configure in the connection string for this provider.
| Property | Description |
| Location | Specifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path. |
| BrowsableSchemas | Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC . |
| Tables | Optional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC . |
| Views | Optional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC . |
Specifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path.
The Location property is only needed if you want to either customize definitions (for example, change a column name, ignore a column, etc.) or extend the data model with new tables, views, or stored procedures.
If left unspecified, the default location is %APPDATA%\\CData\\AzureSynapse Data Provider\\Schema, where %APPDATA% is set to the user's configuration directory:
| Platform | %APPDATA% |
| Windows | The value of the APPDATA environment variable |
| Linux | ~/.config |
Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .
Listing all available database schemas can take extra time, thus degrading performance. Providing a list of schemas in the connection string saves time and improves performance.
Optional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC .
Listing all available tables from some databases can take extra time, thus degrading performance. Providing a list of tables in the connection string saves time and improves performance.
If there are lots of tables available and you already know which ones you want to work with, you can use this property to restrict your viewing to only those tables. To do this, specify the tables you want in a comma-separated list. Each table should be a valid SQL identifier with any special characters escaped using square brackets, double-quotes or backticks. For example, Tables=TableA,[TableB/WithSlash],WithCatalog.WithSchema.`TableC With Space`.
Note: If you are connecting to a data source with multiple schemas or catalogs, you must specify each table you want to view by its fully qualified name. This avoids ambiguity between tables that may exist in multiple catalogs or schemas.
Optional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC .
Listing all available views from some databases can take extra time, thus degrading performance. Providing a list of views in the connection string saves time and improves performance.
If there are lots of views available and you already know which ones you want to work with, you can use this property to restrict your viewing to only those views. To do this, specify the views you want in a comma-separated list. Each view should be a valid SQL identifier with any special characters escaped using square brackets, double-quotes or backticks. For example, Views=ViewA,[ViewB/WithSlash],WithCatalog.WithSchema.`ViewC With Space`.
Note: If you are connecting to a data source with multiple schemas or catalogs, you must specify each view you want to examine by its fully qualified name. This avoids ambiguity between views that may exist in multiple catalogs or schemas.
This section provides a complete list of the Miscellaneous properties you can configure in the connection string for this provider.
| Property | Description |
| CustomizeDateFormat | Specifies the text pattern the provider uses when it parses or writes DATE values. |
| ApplicationIntent | Specifies whether the connection requests a read-write or read-only session when connecting through an Availability Group listener. |
| EnableTransaction | Specifies whether the provider wraps data-modification statements in SQL transactions. |
| IncludeSystemSchemas | Specifies whether the provider returns objects that reside in system schemas including guest, sys, INFORMATION_SCHEMA, and any schema whose name begins with db_. |
| IncludeTableTypes | Specifies whether the provider retrieves the object type (table or view) for each entry it returns during metadata queries. |
| MaxRows | Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY. |
| Other | Specifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues. |
| QueryPassthrough | This option passes the query to the Azure Synapse server as is. |
| Timeout | Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error. |
Specifies the text pattern the provider uses when it parses or writes DATE values.
Most applications don't use this setting because DATE parameters are sent to Azure Synapse as native values, not strings. You need it only when the Sync App has to read or write dates as text. For example, CSV-based bulk loads, flat-file exports, or log files that downstream tools will ingest.
Common patterns include:
Set a pattern that matches the files you must consume or produce. Otherwise the Sync App may fail to parse incoming dates or generate strings your target system rejects. This property is helpful when the data you share or receive is locked into a regional or legacy date layout and you want to avoid a separate conversion step.
Specifies whether the connection requests a read-write or read-only session when connecting through an Availability Group listener.
Set ApplicationIntent to ReadOnly to enable read-only routing.
When the listener receives this value, it forwards the connection to a readable secondary replica, provided one is configured and online.
If you omit the property or leave it at the default value ReadWrite, the listener directs the connection to the primary replica and allows full read-write operations.
Specifies whether the provider wraps data-modification statements in SQL transactions.
When this property is set to true, the Sync App passes any BEGIN TRANSACTION, COMMIT, or ROLLBACK commands through to the database, giving you full atomic commit and rollback support. This setting is valid only on dedicated SQL pools, because they accept transactional commands.
When this property is set to false, every transaction call is treated as a no-op and each statement auto-commits. Serverless SQL pools require this setting, since they do not support transactions at all. Disabling transactions is also useful when a client tool always wraps statements in transactions, but your target pool cannot process them.
Specifies whether the provider returns objects that reside in system schemas including guest, sys, INFORMATION_SCHEMA, and any schema whose name begins with db_.
When this property is set to true, system-schema tables and views appear in metadata queries and can be selected or queried just like user tables.
When this property is set to false, the Sync App filters those objects out of metadata results. Applications that enumerate schemas or tables see only user-defined objects.
This property is helpful when you want to declutter design-time metadata lists. For example, in business intelligence tools that pull every schema or when you need to expose system objects for advanced diagnostics.
Specifies whether the provider retrieves the object type (table or view) for each entry it returns during metadata queries.
When this property is set to true, the Sync App issues an additional query so that metadata lists include a reliable "table" or "view" indicator for every object. This is useful for design tools, ORMs, or business intelligence platforms that need to distinguish tables from views automatically.
When this property is set to false, the Sync App skips the extra lookup, which can reduce metadata-fetch time on large schemas, but the object type field will be blank (or default) in metadata results.
This property is useful when you need to distinguish tables from views automatically. Enabling it prevents misclassification and saves manual filtering later.
Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.
The default value for this property, -1, means that no row limit is enforced unless the query explicitly includes a LIMIT clause. (When a query includes a LIMIT clause, the value specified in the query takes precedence over the MaxRows setting.)
Setting MaxRows to a whole number greater than 0 ensures that queries do not return excessively large result sets by default.
This property is useful for optimizing performance and preventing excessive resource consumption when executing queries that could otherwise return very large datasets.
Specifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues.
This property allows advanced users to configure hidden properties for specialized situations, with the advice of our Support team. These settings are not required for normal use cases but can address unique requirements or provide additional functionality. To define multiple properties, use a semicolon-separated list.
Note: It is strongly recommended to set these properties only when advised by the Support team to address specific scenarios or issues.
| Property | Description |
| DefaultColumnSize | Sets the default length of string fields when the data source does not provide column length in the metadata. The default value is 2000. |
| ConvertDateTimeToGMT=True | Converts date-time values to GMT, instead of the local time of the machine. The default value is False (use local time). |
| RecordToFile=filename | Records the underlying socket data transfer to the specified file. |
This option passes the query to the Azure Synapse server as is.
When this is set, queries are passed through directly to Azure Synapse.
Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error.
The timeout applies to each individual communication with the server rather than the entire query or operation. For example, a query could continue running beyond 60 seconds if each paging call completes within the timeout limit.
Timeout is set to 60 seconds by default. To disable timeouts, set this property to 0.
Disabling the timeout allows operations to run indefinitely until they succeed or fail due to other conditions such as server-side timeouts, network interruptions, or resource limits on the server.
Note: Use this property cautiously to avoid long-running operations that could degrade performance or result in unresponsive behavior.
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