Adding a Connection to SQL Server

To add a connection to SQL Server:

1. In the application console, navigate to the Connections page.
2. At the Add Connections panel, select the icon for the connection you want to add.
3. If the SQL Server icon is not available, click the Add More icon to download and install the SQL Server connector from the CData site.

For required properties, see the Settings tab.

For connection properties that are not typically required, see the Advanced tab.

You can use the SQL Server Connector for CData Sync to connect to any instance of Microsoft SQL Server, Azure SQL Server, or Azure Data Warehouse.

Connecting to to Microsoft SQL Server

Specify the following connection properties to connect to SQL Server:

• Server: The name of the server running SQL Server.
• Database: The name of the SQL Server database.

Authenticating to SQL Server

The Sync App supports authenticating to SQL Server using SQL Server authentication, Windows Authentication, or Kerberos authentication.

SQL Server Authentication

To authenticate to Microsoft SQL Server using your SQL Server user login credentials, set the following:

• AuthScheme: Set this to Password.
• User: The username provided for authentication with SQL Server.
• Password: The password associated with the authenticating user.

Windows Authentication

To enable the Sync App to obtain login credentials automatically from the identity of the windows user running the process, set the following:

• AuthScheme: Set this to NTLM.
• IntegratedSecurity: Set this to true.

Kerberos

To authenticate to SQL Server with Kerberos, set AuthScheme to KERBEROS.

Authenticating to SQL Server via Kerberos requires you to define authentication properties and to choose how Kerberos should retrieve authentication tickets.

Retrieve Kerberos Tickets

Kerberos tickets are used to authenticate the requester's identity. The use of tickets instead of formal logins/passwords eliminates the need to store passwords locally or send them over a network. Users are reauthenticated (tickets are refreshed) whenever they log in at their local computer or enter kinit USER at the command prompt.

The Sync App provides three ways to retrieve the required Kerberos ticket, depending on whether or not the KRB5CCNAME and/or KerberosKeytabFile variables exist in your environment.

MIT Kerberos Credential Cache File

This option enables you to use the MIT Kerberos Ticket Manager or kinit command to get tickets. With this option there is no need to set the User or Password connection properties.

This option requires that KRB5CCNAME has been created in your system.

To enable ticket retrieval via MIT Cerberos Credential Cache Files:

1. Ensure that the KRB5CCNAME variable is present in your environment.
2. Set KRB5CCNAME to a path that points to your credential cache file. (For example, C:\krb_cache\krb5cc_0 or /tmp/krb5cc_0.) The credential cache file is created when you use the MIT Kerberos Ticket Manager to generate your ticket.
3. To obtain a ticket:
   1. Open the MIT Kerberos Ticket Manager application.
   2. Click Get Ticket.
   3. Enter your principal name and password.
   4. Click OK.

   If the ticket is successfully obtained, the ticket information appears in Kerberos Ticket Manager and is stored in the credential cache file.

The Sync App uses the cache file to obtain the Kerberos ticket to connect to SQL Server.

Note: If you would prefer not to edit KRB5CCNAME, you can use the KerberosTicketCache property to set the file path manually. After this is set, the Sync App uses the specified cache file to obtain the Kerberos ticket to connect to SQL Server.

Keytab File

If your environment lacks the KRB5CCNAME environment variable, you can retrieve a Kerberos ticket using a Keytab File.

To use this method, set the User property to the desired username, and set the KerberosKeytabFile property to a file path pointing to the keytab file associated with the user.

User and Password

If your environment lacks the KRB5CCNAME environment variable and the KerberosKeytabFile property has not been set, you can retrieve a ticket using a user and password combination.

To use this method, set the User and Password properties to the user/password combination that you use to authenticate with SQL Server.

Enabling Cross-Realm Authentication

More complex Kerberos environments can require cross-realm authentication where multiple realms and KDC servers are used. For example, they might use one realm/KDC for user authentication, and another realm/KDC for obtaining the service ticket.

To enable this kind of cross-realm authentication, set the KerberosRealm and KerberosKDC properties to the values required for user authentication. Also, set the KerberosServiceRealm and KerberosServiceKDC properties to the values required to obtain the service ticket.

Connecting to Azure SQL Server and Azure Data Warehouse

You can connect to Azure SQL Server or Azure Data Warehouse by setting the following connection properties:

• Server: The server running Azure. You can find this by logging into the Azure portal and navigating to SQL databases (or SQL data warehouses) -> Select your database -> Overview -> Server name.
• Database: The name of the database, as seen in the Azure portal on the SQL databases (or SQL warehouses) page.

Azure

Standard credentials may be used to authenticate to an Azure-hosted SQL Server. To do so, set the following:

• AuthScheme: Password (SQL Server credentials) or NTLM (Windows Credentials).
• User: The name of the user authenticating to Azure.
• Password: The password associated with the authenticating user.

Alternatively, a form of OAuth may be used by setting AuthScheme to one of AzureAd, AzurePassword, or AzureMSI. All OAuth connections require setting Tenant:

• AzureTenant: The id of the tenant the SQL Server database is hosted on.

AzureAD

Azure AD

Azure AD is Microsoft’s multi-tenant, cloud-based directory and identity management service. It is user-based authentication that requires that you set AuthScheme to AzureAD.

OAuth

CData provides an embedded OAuth application that simplifies authentication. You can, however, create a custom application for authentication. For information about creating a custom application and reasons for doing so, see Creating a Custom Azure AD Application.

For authentication, the only difference between using the CData-provided (embedded) application and creating your own custom application is that you must set two additional connection properties in the Advanced Tab when using custom OAuth applications.

Before you connect, for Custom Azure AD applications only, set the following variables:

• OAuthClientId: The client Id assigned when you registered your custom OAuth application.
• OAuthClientSecret: The client secret assigned when you registered your custom OAuth application.

Click Connect to SQL Server to open the OAuth endpoint in your default browser. Log in and grant permissions to the application.

The driver then completes the OAuth process as follows:

• Extracts the access token from the callback URL.
• Obtains a new access token when the old one expires.
• Saves OAuth values so that they persist across connections.

Azure Service Principal

Azure Service Principal is role-based application-based authentication. This means that authentication is done per application, rather than per user. All tasks taken by the app are done without a default user context, but based on the assigned roles. The application access to the resources is controlled through the assigned roles' permissions.

To use Azure Service Principal authentication, you must:

• Set up the ability to assign a role to the authentication application. To do this, create a custom OAuth AD application, as described in Creating a Custom Azure AD Application.
• Register an application with an Azure AD tenant, to create a new service principal that can be used with the role-based access control, to access resources in your subscription.

Do the following:

1. Create a custom Azure AD application, as described in Creating a Custom Azure AD Application.
2. Assign a role to the application:
   1. Use the search bar to search for the Subscriptions service.
   2. Open the Subscriptions page.
   3. Select the subscription to which to assign the application.
   4. Open the Access control (IAM).
   5. Select Add > Add role assignment. SQL Server opens the Add role assignment page.
   6. Assign your custom Azure AD application the role of Owner.

Client Credentials

Client credentials refers to a flow in OAuth where there is no direct user authentication taking place. Instead, credentials are created for just the application itself. All tasks taken by the application are done without a default user context. This makes the authentication flow a bit different from the standard flow.

All permissions related to the client OAuth flow require admin consent. This means you cannot use the application embedded with the CData Sync App in the client OAuth flow. You must create your own OAuth application to use client credentials. See Creating a Custom Azure AD Application for more information.

In your App Registration in portal.azure.com, navigate to API Permissions and select the Microsoft Graph permissions. There are two distinct sets of permissions: Delegated permissions and Application permissions. The permissions used during client credential authentication are under "Application Permissions".

Select the permissions you require for your integration. After you do this, set the following connection properties:

• AuthScheme: AzureServicePrincipal.
• InitiateOAuth: GETANDREFRESH. You can use InitiateOAuth to avoid repeating the OAuth exchange and manually setting the OAuthAccessToken.
• AzureTenant: The tenant you wish to connect to.
• OAuthGrantType: CLIENT.
• OAuthClientId: The client Id in your application settings.
• OAuthClientSecret: The client secret in your application settings.

Authentication with client credentials takes place automatically like any other connection, except there is no window opened prompting the user. Because there is no user context, there is no need for a browser popup. Connections will take place and be handled internally.

Auth Certificate

Auth Certificate refers to an OAuth flow that uses a certificate to enable server-to-server authentication. All permissions related to the client OAuth flow require admin consent. This means you cannot use the application embedded with the CData Sync App in the client OAuth flow. You must create your own OAuth application to use an OAuth certificate. See Creating a Custom Azure AD Application for more information.

In your App Registration in portal.azure.com, navigate to API Permissions and select the client Graph permissions. There are two distinct sets of permissions: Delegated permissions and Application permissions. The permissions used during certificate authentication are under "Application Permissions".

Select the permissions that apply to your particular integration. After you do this, set the following connection properties:

• AuthScheme: AzureServicePrincipalCert.
• AzureTenant: The tenant to which you need to connect.
• OAuthJWTCert: The JWT Certificate store.
• OAuthJWTIssuer: The OAuth client Id.
• OAuthJWTCertType: The type of the certificate store specified by OAuthJWTCert.

Certificate authentication takes place automatically. Since there is no user context, there is no pop-up to signal the point at which authentication occurs. Connections are made and handled internally.

Azure Password

Set AuthScheme to AzurePassword.

To connect using your Azure credentials directly, specify the following connection properties:

• User: Set this to the user account you use to connect to Azure.
• Password: Set this to the password you use to connect to Azure.
• AzureTenant: Set this to the Directory (tenant) ID, found on the Overview page of the OAuth app used to authenticate to SQL Server on Azure.

Managed Service Identity (MSI)

If you are running SQL Server on an Azure VM and want to leverage MSI to connect, set AuthScheme to AzureMSI.

User-Managed Identities

To obtain a token for a managed identity, use the OAuthClientId property to specify the managed identity's "client_id".

When your VM has multiple user-assigned managed identities, you must also specify OAuthClientId.

Creating a Custom OAuth Application

SQL Server supports authentication using Azure AD and Azure Service Principal, both of which are OAuth-based.

This topic describes how to:

• create and register custom OAuth application for Azure AD or Azure Service Principal
• create a custom OAuth application for use with client credentials

Azure AD

In portal.azure.com:

1. Log in to https://portal.azure.com.
2. In the left-hand navigation pane, select Azure Active Directory, then applicationRegistrations.
3. Click New registration.
4. Enter a name for the application.
5. Select the desired tenant setup: single- or multi-tenant, and public or private use.
   • If you select the default option, "Accounts in this organizational directory only", you must set the AzureTenant connection property to the Id of the Azure AD Tenant when establishing a connection with the CData Sync App. Otherwise, the authentication attempt fails with an error.
   • If your application is for private use only, specify Accounts in this organization directory only.
   • If you want to distribute your application, choose one of the multi-tenant options.

6. Set the redirect url to http://localhost:33333 (the Sync App's default) OR specify a different port and set CallbackURL to the exact reply URL you defined.
7. Click Register to register the new application. An application management screen displays.
   Note the value in Application (client) ID as the OAuthClientId and the Directory (tenant) ID as the AzureTenant.
8. Navigate to Certificates & Secrets and define the application authentication type. There are two types of authentication available: certificate (recommended) or client secret.
   • For certificate authentication: In Certificates & Secrets, select Upload certificate, then upload the certificate from your local machine.
   • For creating a new client secret: In Certificates & Secrets, select New Client Secret for the application and specify its duration. After the client secret is saved, SQL Server displays the key value. Copy this value, as it is displayed only once. This value becomes the OAuthClientSecret.

9. Select API Permissions > Add > Delegated permissions.
10. Save your changes.
11. If you have specified the use of permissions that require admin consent (such as the Application Permissions), you can grant them from the current tenant on the API Permissions page.
12. Set the AuthScheme to AzureAD. This is required to create users for the OAuth app.
13. Add the user to the database by running: CREATE USER [OAuth_APP] FROM EXTERNAL PROVIDER. This command must be run by the SQL Active Directory admin asssigned to the SQL Server instance.
14. Enable the Directory readers role for the Active Directory admin user.

Azure Service Principal

To use Azure Service Principal authentication, you must set up the ability to assign a role to the authentication application, then register an application with the Azure AD tenant to create a new Service Principal. That new Service Principal can then leverage the assigned role-based access control to access resources in your subscription.

In portal.azure.com:

1. Create a custom OAuth AD application, as described above.
2. Use the search bar to search for the Subscriptions service.
3. Open the Subscriptions page.
4. Select the subscription to which to assign the application.
5. Open the Access control (IAM).
6. Select Add > Add role assignment. SQL Server opens the Add role assignment page.
7. Assign your custom Azure AD application the role of Owner.

Consent for Client Credentials

OAuth supports the use of client credentials to authenticate. In a client credentials OAuth flow, credentials are created for the authenticating application itself. The auth flow acts just like the usual auth flow except that there is no prompt for an associated user to provide credentials. All tasks accepted by the application are executed outside of the context of a default user.

Note: Since the embedded OAuth credentials authenticate on a per-user basis, you cannot use them in a client OAuth flow. You must always create a custom OAuth application to use client credentials.

In portal.azure.com:

1. Create a custom OAuth application, as described above.
2. Navigate to App Registrations.
3. Find the application you just created, and open API Permissions.
4. Select the Microsoft Graph permissions. There are two distinct sets of permissions: Delegated and Application.
5. Under Application Permissions, select the permissions you require for your integration.

Client OAuth Flow With a Certificate

All permissions related to the client OAuth flow require admin consent. This means the application embedded with the CData Sync App cannot be used in the client OAuth flow. You must create your own OAuth application in order to use client credentials, as described above.

After your OAuth application is created:

1. Return to portal.azure.com.
2. Navigate to App Registration.
3. Find the application you just created.
4. Under API Permissions, select the Microsoft Graph permissions.
   There are two distinct sets of permissions: Delegated permissions and Application permissions. The permissions used during client credential authentication are under Application Permissions.
5. Select the permissions that apply to your particular integration.

Creating a Custom OAuth Application

SQL Server supports authentication using Azure AD and Azure Service Principal, both of which are OAuth-based.

This topic describes how to:

• create and register custom OAuth application for Azure AD or Azure Service Principal
• create a custom OAuth application for use with client credentials

Azure AD

In portal.azure.com:

1. Log in to https://portal.azure.com.
2. In the left-hand navigation pane, select Azure Active Directory, then applicationRegistrations.
3. Click New registration.
4. Enter a name for the application.
5. Select the desired tenant setup: single- or multi-tenant, and public or private use.
   • If you select the default option, "Accounts in this organizational directory only", you must set the AzureTenant connection property to the Id of the Azure AD Tenant when establishing a connection with the CData Sync App. Otherwise, the authentication attempt fails with an error.
   • If your application is for private use only, specify Accounts in this organization directory only.
   • If you want to distribute your application, choose one of the multi-tenant options.

6. Set the redirect url to http://localhost:33333 (the Sync App's default) OR specify a different port and set CallbackURL to the exact reply URL you defined.
7. Click Register to register the new application. An application management screen displays.
   Note the value in Application (client) ID as the OAuthClientId and the Directory (tenant) ID as the AzureTenant.
8. Navigate to Certificates & Secrets and define the application authentication type. There are two types of authentication available: certificate (recommended) or client secret.
   • For certificate authentication: In Certificates & Secrets, select Upload certificate, then upload the certificate from your local machine.
   • For creating a new client secret: In Certificates & Secrets, select New Client Secret for the application and specify its duration. After the client secret is saved, SQL Server displays the key value. Copy this value, as it is displayed only once. This value becomes the OAuthClientSecret.

9. Select API Permissions > Add > Delegated permissions.
10. Save your changes.
11. If you have specified the use of permissions that require admin consent (such as the Application Permissions), you can grant them from the current tenant on the API Permissions page.
12. Set the AuthScheme to AzureAD. This is required to create users for the OAuth app.
13. Add the user to the database by running: CREATE USER [OAuth_APP] FROM EXTERNAL PROVIDER. This command must be run by the SQL Active Directory admin asssigned to the SQL Server instance.
14. Enable the Directory readers role for the Active Directory admin user.

Azure Service Principal

To use Azure Service Principal authentication, you must set up the ability to assign a role to the authentication application, then register an application with the Azure AD tenant to create a new Service Principal. That new Service Principal can then leverage the assigned role-based access control to access resources in your subscription.

In portal.azure.com:

1. Create a custom OAuth AD application, as described above.
2. Use the search bar to search for the Subscriptions service.
3. Open the Subscriptions page.
4. Select the subscription to which to assign the application.
5. Open the Access control (IAM).
6. Select Add > Add role assignment. SQL Server opens the Add role assignment page.
7. Assign your custom Azure AD application the role of Owner.

Consent for Client Credentials

OAuth supports the use of client credentials to authenticate. In a client credentials OAuth flow, credentials are created for the authenticating application itself. The auth flow acts just like the usual auth flow except that there is no prompt for an associated user to provide credentials. All tasks accepted by the application are executed outside of the context of a default user.

Note: Since the embedded OAuth credentials authenticate on a per-user basis, you cannot use them in a client OAuth flow. You must always create a custom OAuth application to use client credentials.

In portal.azure.com:

1. Create a custom OAuth application, as described above.
2. Navigate to App Registrations.
3. Find the application you just created, and open API Permissions.
4. Select the Microsoft Graph permissions. There are two distinct sets of permissions: Delegated and Application.
5. Under Application Permissions, select the permissions you require for your integration.

Client OAuth Flow With a Certificate

All permissions related to the client OAuth flow require admin consent. This means the application embedded with the CData Sync App cannot be used in the client OAuth flow. You must create your own OAuth application in order to use client credentials, as described above.

After your OAuth application is created:

1. Return to portal.azure.com.
2. Navigate to App Registration.
3. Find the application you just created.
4. Under API Permissions, select the Microsoft Graph permissions.
   There are two distinct sets of permissions: Delegated permissions and Application permissions. The permissions used during client credential authentication are under Application Permissions.
5. Select the permissions that apply to your particular integration.

This section details a selection of advanced features of the SQL Server Sync App.

SSL Configuration

Use SSL Configuration to adjust how Sync App handles TLS/SSL certificate negotiations. You can choose from various certificate formats; see the SSLServerCert property under "Connection String Options" for more information.

Firewall and Proxy

Configure the Sync App for compliance with Firewall and Proxy, including Windows proxies and HTTP proxies. You can also set up tunnel connections.

Logging

See Logging for an overview of configuration settings that can be used to refine CData logging. For basic logging, you only need to set two connection properties, but there are numerous features that support more refined logging, where you can select subsets of information to be logged using the LogModules connection property.

Customizing the SSL Configuration

By default, the Sync App attempts to negotiate SSL/TLS by checking the server's certificate against the system's trusted certificate store.

To specify another certificate, see the SSLServerCert property for the available formats to do so.

Client SSL Certificates

The SQL Server Sync App also supports setting client certificates. Set the following to connect using a client certificate.

• SSLClientCert: The name of the certificate store for the client certificate.
• SSLClientCertType: The type of key store containing the TLS/SSL client certificate.
• SSLClientCertPassword: The password for the TLS/SSL client certificate.
• SSLClientCertSubject: The subject of the TLS/SSL client certificate.

Connecting Through a Firewall or Proxy

HTTP Proxies

To connect through the Windows system proxy, you do not need to set any additional connection properties. To connect to other proxies, set ProxyAutoDetect to false.

In addition, to authenticate to an HTTP proxy, set ProxyAuthScheme, ProxyUser, and ProxyPassword, in addition to ProxyServer and ProxyPort.

Other Proxies

Set the following properties:

• To use a proxy-based firewall, set FirewallType, FirewallServer, and FirewallPort.
• To tunnel the connection, set FirewallType to TUNNEL.
• To authenticate, specify FirewallUser and FirewallPassword.
• To authenticate to a SOCKS proxy, additionally set FirewallType to SOCKS5.

In addition to modeling data directly from SQL Server, the CData Sync App also includes a few built in stored procedures designed for assisting with OAuth connections against Azure hosted SQL Server. The stored procedures are listed here.

Data Type Mappings

The Sync App maps types from the data source to the corresponding data type available in the schema. The table below documents these mappings.

SQL Server	CData Schema
bigint	long
bigint identity	long
binary	binary
bit	bool
char	string
date	date
datetime	datetime
datetimeoffset	datetime
datetime2	datetime
decimal	decimal
decimal identity	decimal
float	float
geography	binary
geometry	binary
hierarchyid	binary
image	binary
int	int
int identity	int
money	decimal
nchar	string
ntext	string
nvarchar	string
numeric	decimal
numeric identity	decimal
real	float
rowversion	binary
smalldatetime	datetime
smallint	short
smallint identity	short
smallmoney	decimal
sql_variant	binary
table	string
text	string
time	time
timestamp	binary
tinyint	byte
tinyint identity	byte
uniqueidentifier	string
varbinary	binary
varchar	string
xml	string

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.

Authentication

---

Property	Description
AuthScheme	The scheme used for authentication. Accepted entries are Password, NTLM, Kerberos, AzurePassword, AzureAD, AzureMSI, AzureServicePrincipal, AzureServicePrincipalCert.
Server	The name of the server running SQL Server.
Port	The port of the MS SQL Server.
Database	The name of the SQL Server database.
User	The SQL Server user account used to authenticate.
Password	The password used to authenticate the user.
Domain	The name of the domain for a Windows (NTLM) security login.
NTLMVersion	The NTLM version.
Encrypt	This field sets whether SSL is enabled.

Azure Authentication

---

Property	Description
AzureTenant	The Microsoft Online tenant being used to access data. If not specified, your default tenant is used.
AzureEnvironment	The Azure Environment to use when establishing a connection.

OAuth

---

Property	Description
OAuthClientId	The client Id assigned when you register your application with an OAuth authorization server.
OAuthClientSecret	The client secret assigned when you register your application with an OAuth authorization server.
OAuthGrantType	The grant type for the OAuth flow.

JWT OAuth

---

Property	Description
OAuthJWTCert	The JWT Certificate store.
OAuthJWTCertType	The type of key store containing the JWT Certificate.
OAuthJWTCertPassword	The password for the OAuth JWT certificate.
OAuthJWTCertSubject	The subject of the OAuth JWT certificate.

Kerberos

---

Property	Description
KerberosKDC	The Kerberos Key Distribution Center (KDC) service used to authenticate the user.
KerberosRealm	The Kerberos Realm used to authenticate the user.
KerberosSPN	The service principal name (SPN) for the Kerberos Domain Controller.
KerberosKeytabFile	The Keytab file containing your pairs of Kerberos principals and encrypted keys.
KerberosServiceRealm	The Kerberos realm of the service.
KerberosServiceKDC	The Kerberos KDC of the service.
KerberosTicketCache	The full file path to an MIT Kerberos credential cache file.

SSL

---

Property	Description
SSLClientCert	The TLS/SSL client certificate store for SSL Client Authentication (2-way SSL).
SSLClientCertType	The type of key store containing the TLS/SSL client certificate.
SSLClientCertPassword	The password for the TLS/SSL client certificate.
SSLClientCertSubject	The subject of the TLS/SSL client certificate.
SSLServerCert	The certificate to be accepted from the server when connecting using TLS/SSL.

SSH

---

Property	Description
SSHAuthMode	The authentication method used when establishing an SSH Tunnel to the service.
SSHClientCert	A certificate to be used for authenticating the SSHUser.
SSHClientCertPassword	The password of the SSHClientCert key if it has one.
SSHClientCertSubject	The subject of the SSH client certificate.
SSHClientCertType	The type of SSHClientCert private key.
SSHServer	The SSH server.
SSHPort	The SSH port.
SSHUser	The SSH user.
SSHPassword	The SSH password.
SSHServerFingerprint	The SSH server fingerprint.
UseSSH	Whether to tunnel the SQL Server connection over SSH. Use SSH.

Firewall

---

Property	Description
FirewallType	The protocol used by a proxy-based firewall.
FirewallServer	The name or IP address of a proxy-based firewall.
FirewallPort	The TCP port for a proxy-based firewall.
FirewallUser	The user name to use to authenticate with a proxy-based firewall.
FirewallPassword	A password used to authenticate to a proxy-based firewall.

Proxy

---

Property	Description
ProxyAutoDetect	This indicates whether to use the system proxy settings or not.
ProxyServer	The hostname or IP address of a proxy to route HTTP traffic through.
ProxyPort	The TCP port the ProxyServer proxy is running on.
ProxyAuthScheme	The authentication type to use to authenticate to the ProxyServer proxy.
ProxyUser	A user name to be used to authenticate to the ProxyServer proxy.
ProxyPassword	A password to be used to authenticate to the ProxyServer proxy.
ProxySSLType	The SSL type to use when connecting to the ProxyServer proxy.
ProxyExceptions	A semicolon separated list of destination hostnames or IPs that are exempt from connecting through the ProxyServer .

Logging

---

Property	Description
LogModules	Core modules to be included in the log file.

Schema

---

Property	Description
Location	A path to the directory that contains the schema files defining tables, views, and stored procedures.
BrowsableSchemas	This property restricts the schemas reported to a subset of the available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC.
Tables	This property restricts the tables reported to a subset of the available tables. For example, Tables=TableA,TableB,TableC.
Views	Restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC.

Miscellaneous

---

Property	Description
ApplicationIntent	The application intent connection string property expresses the client application's request to be directed either to a read-write or read-only version of an availability group database. To use read-only routing, a client must use an application intent of read-only in the connection string when connecting to the availability group listener. Without the read-only application intent, connections to the availability group listener are directed to the database on the primary replica.
ApplicationName	The application name connection string property expresses the HTTP User-Agent.
IncludeSystemSchemas	This property specifies whether to query the system schemas, including 'guest' and those whose names start with 'db_'.
IncludeTableTypes	If set to true, the provider will query for the types of individual tables and views.
MaxRows	Limits the number of rows returned when no aggregation or GROUP BY is used in the query. This takes precedence over LIMIT clauses.
Other	These hidden properties are used only in specific use cases.
QueryPassthrough	This option passes the query to the SQL Server server as is.
Timeout	A timeout for the provider.

This section provides a complete list of the Authentication properties you can configure in the connection string for this provider.

---

Property	Description
AuthScheme	The scheme used for authentication. Accepted entries are Password, NTLM, Kerberos, AzurePassword, AzureAD, AzureMSI, AzureServicePrincipal, AzureServicePrincipalCert.
Server	The name of the server running SQL Server.
Port	The port of the MS SQL Server.
Database	The name of the SQL Server database.
User	The SQL Server user account used to authenticate.
Password	The password used to authenticate the user.
Domain	The name of the domain for a Windows (NTLM) security login.
NTLMVersion	The NTLM version.
Encrypt	This field sets whether SSL is enabled.

The scheme used for authentication. Accepted entries are Password, NTLM, Kerberos, AzurePassword, AzureAD, AzureMSI, AzureServicePrincipal, AzureServicePrincipalCert.

Remarks

Together with Password and User, this field is used to authenticate against the server. Password is the default option. Use the following options to select your authentication scheme:

• Password: Set this to use your SQL Server Password.
• NTLM: Set this to use your Windows credentials to authenticate.
• Kerberos: Set this to use Kerberos authentication.
• AzurePassword: Set this to use Azure Active Directory Password authentication.
• AzureAD: Set this to use Azure Active Directory OAuth authentication.
• AzureMSI: Set this to use Azure Active Directory Managed Service Identity authentication.
• AzureServicePrincipal: Set this to authenticate as an Azure Service Principal.
• AzureServicePrincipalCert: Set this to authenticate as an Azure Service Principal using a certificate.

The name of the server running SQL Server.

Remarks

Set this property to the name or network address of the SQL Server instance.

The port of the MS SQL Server.

Remarks

The port of the Server hosting the MS SQL Server Database.

The name of the SQL Server database.

Remarks

The name of the SQL Server database running on the specified Server.

The SQL Server user account used to authenticate.

Remarks

Together with Password, this field is used to authenticate against the SQL Server server.

The password used to authenticate the user.

Remarks

The User and Password are together used to authenticate with the server.

The name of the domain for a Windows (NTLM) security login.

Remarks

The name of the domain for a Windows (NTLM) security login.

The NTLM version.

Remarks

This property specifies the NTLM version to use.

This field sets whether SSL is enabled.

Remarks

This field sets whether the Sync App will attempt to negotiate TLS/SSL connections to the server. By default, the Sync App checks the server's certificate against the system's trusted certificate store. To specify another certificate, set SSLServerCert.

This section provides a complete list of the Azure Authentication properties you can configure in the connection string for this provider.

---

Property	Description
AzureTenant	The Microsoft Online tenant being used to access data. If not specified, your default tenant is used.
AzureEnvironment	The Azure Environment to use when establishing a connection.

The Microsoft Online tenant being used to access data. If not specified, your default tenant is used.

Remarks

The Microsoft Online tenant being used to access data. For instance, contoso.onmicrosoft.com. Alternatively, specify the tenant Id. This value is the directory Id in the Azure Portal > Azure Active Directory > Properties.

Typically it is not necessary to specify the Tenant. This can be automatically determined by Microsoft when using the OAuthGrantType set to CODE (default). However, it may fail in the case that the user belongs to multiple tenants. For instance, if an Admin of domain A invites a user of domain B to be a guest user. The user will now belong to both tenants. It is a good practice to specify the Tenant, although in general things should normally work without having to specify it.

The AzureTenant is required when setting OAuthGrantType to CLIENT. When using client credentials, there is no user context. The credentials are taken from the context of the app itself. While Microsoft still allows client credentials to be obtained without specifying which Tenant, it has a much lower probability of picking the specific tenant you want to work with. For this reason, we require AzureTenant to be explicitly stated for all client credentials connections to ensure you get credentials that are applicable for the domain you intend to connect to.

The Azure Environment to use when establishing a connection.

Remarks

In most cases, leaving the environment set to global will work. However, if your Azure Account has been added to a different environment, the AzureEnvironment may be used to specify which environment. The available values are GLOBAL, CHINA, USGOVT, USGOVTDOD.

This section provides a complete list of the OAuth properties you can configure in the connection string for this provider.

---

Property	Description
OAuthClientId	The client Id assigned when you register your application with an OAuth authorization server.
OAuthClientSecret	The client secret assigned when you register your application with an OAuth authorization server.
OAuthGrantType	The grant type for the OAuth flow.

The client Id assigned when you register your application with an OAuth authorization server.

Remarks

As part of registering an OAuth application, you will receive the OAuthClientId value, sometimes also called a consumer key, and a client secret, the OAuthClientSecret.

The client secret assigned when you register your application with an OAuth authorization server.

Remarks

As part of registering an OAuth application, you will receive the OAuthClientId, also called a consumer key. You will also receive a client secret, also called a consumer secret. Set the client secret in the OAuthClientSecret property.

The grant type for the OAuth flow.

Remarks

The following options are available: CODE,CLIENT

This section provides a complete list of the JWT OAuth properties you can configure in the connection string for this provider.

---

Property	Description
OAuthJWTCert	The JWT Certificate store.
OAuthJWTCertType	The type of key store containing the JWT Certificate.
OAuthJWTCertPassword	The password for the OAuth JWT certificate.
OAuthJWTCertSubject	The subject of the OAuth JWT certificate.

The JWT Certificate store.

Remarks

The name of the certificate store for the client certificate.

The OAuthJWTCertType field specifies the type of the certificate store specified by OAuthJWTCert. If the store is password protected, specify the password in OAuthJWTCertPassword.

OAuthJWTCert is used in conjunction with the OAuthJWTCertSubject field in order to specify client certificates. If OAuthJWTCert has a value, and OAuthJWTCertSubject is set, a search for a certificate is initiated. Please refer to the OAuthJWTCertSubject field for details.

Designations of certificate stores are platform-dependent.

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.

In Java, the certificate store normally is a file containing certificates and optional private keys.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e. PKCS12 certificate store).

The type of key store containing the JWT Certificate.

Remarks

This property can take one of the following values:

USER	For Windows, this specifies that the certificate store is a certificate store owned by the current user. Note: This store type is not available in Java.
MACHINE	For Windows, this specifies that the certificate store is a machine store. Note: 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: this store type is only available in Java.
JKSBLOB	The certificate store is a string (base-64-encoded) representing a certificate store in Java key store (JKS) format. Note: 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 PPK (PuTTY Private Key).
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.

The password for the OAuth JWT certificate.

Remarks

If the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store.

The subject of the OAuth JWT certificate.

Remarks

When loading a certificate the subject is used to locate the certificate in the store.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks the first certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, [email protected]". Common fields and their meanings are displayed below.

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 it must be quoted.

This section provides a complete list of the Kerberos properties you can configure in the connection string for this provider.

---

Property	Description
KerberosKDC	The Kerberos Key Distribution Center (KDC) service used to authenticate the user.
KerberosRealm	The Kerberos Realm used to authenticate the user.
KerberosSPN	The service principal name (SPN) for the Kerberos Domain Controller.
KerberosKeytabFile	The Keytab file containing your pairs of Kerberos principals and encrypted keys.
KerberosServiceRealm	The Kerberos realm of the service.
KerberosServiceKDC	The Kerberos KDC of the service.
KerberosTicketCache	The full file path to an MIT Kerberos credential cache file.

The Kerberos Key Distribution Center (KDC) service used to authenticate the user.

Remarks

The Kerberos properties are used when using SPNEGO or Windows Authentication. The Sync App will request session tickets and temporary session keys from the Kerberos KDC service. The Kerberos KDC service is conventionally colocated with the domain controller.

If Kerberos KDC is not specified, the Sync App will attempt to detect these properties automatically from the following locations:

• KRB5 Config File (krb5.ini/krb5.conf): If the KRB5_CONFIG environment variable is set and the file exists, the Sync App will obtain the KDC from the specified file. Otherwise, it will attempt to read from the default MIT location based on the OS: C:\ProgramData\MIT\Kerberos5\krb5.ini (Windows) or /etc/krb5.conf (Linux).
• Domain Name and Host: If the Kerberos Realm and Kerberos KDC could not be inferred from another location, the Sync App will infer them from the configured domain name and host.

The Kerberos Realm used to authenticate the user.

Remarks

The Kerberos properties are used when using SPNEGO or Windows Authentication. The Kerberos Realm is used to authenticate the user with the Kerberos Key Distribution Service (KDC). The Kerberos Realm can be configured by an administrator to be any string, but conventionally it is based on the domain name.

If Kerberos Realm is not specified, the Sync App will attempt to detect these properties automatically from the following locations:

• KRB5 Config File (krb5.ini/krb5.conf): If the KRB5_CONFIG environment variable is set and the file exists, the Sync App will obtain the default realm from the specified file. Otherwise, it will attempt to read from the default MIT location based on the OS: C:\ProgramData\MIT\Kerberos5\krb5.ini (Windows) or /etc/krb5.conf (Linux)
• Domain Name and Host: If the Kerberos Realm and Kerberos KDC could not be inferred from another location, the Sync App will infer them from the user-configured domain name and host. This might work in some Windows environments.

The service principal name (SPN) for the Kerberos Domain Controller.

Remarks

If the SPN on the Kerberos Domain Controller is not the same as the URL that you are authenticating to, use this property to set the SPN.

The Keytab file containing your pairs of Kerberos principals and encrypted keys.

Remarks

The Keytab file containing your pairs of Kerberos principals and encrypted keys.

The Kerberos realm of the service.

Remarks

The KerberosServiceRealm is the specify the service Kerberos realm when using cross-realm Kerberos authentication.

In most cases, a single realm and KDC machine are used to perform the Kerberos authentication and this property is not required.

This property is available for complex setups where a different realm and KDC machine are used to obtain an authentication ticket (AS request) and a service ticket (TGS request).

The Kerberos KDC of the service.

Remarks

The KerberosServiceKDC is used to specify the service Kerberos KDC when using cross-realm Kerberos authentication.

In most cases, a single realm and KDC machine are used to perform the Kerberos authentication and this property is not required.

This property is available for complex setups where a different realm and KDC machine are used to obtain an authentication ticket (AS request) and a service ticket (TGS request).

The full file path to an MIT Kerberos credential cache file.

Remarks

This property can be set if you wish to use a credential cache file that was created using the MIT Kerberos Ticket Manager or kinit command.

This section provides a complete list of the SSL properties you can configure in the connection string for this provider.

---

Property	Description
SSLClientCert	The TLS/SSL client certificate store for SSL Client Authentication (2-way SSL).
SSLClientCertType	The type of key store containing the TLS/SSL client certificate.
SSLClientCertPassword	The password for the TLS/SSL client certificate.
SSLClientCertSubject	The subject of the TLS/SSL client certificate.
SSLServerCert	The certificate to be accepted from the server when connecting using TLS/SSL.

The TLS/SSL client certificate store for SSL Client Authentication (2-way SSL).

Remarks

The name of the certificate store for the client certificate.

The SSLClientCertType field specifies the type of the certificate store specified by SSLClientCert. If the store is password protected, specify the password in SSLClientCertPassword.

SSLClientCert is used in conjunction with the SSLClientCertSubject field in order to specify client certificates. If SSLClientCert has a value, and SSLClientCertSubject is set, a search for a certificate is initiated. See SSLClientCertSubject for more information.

Designations of certificate stores are platform-dependent.

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.

In Java, the certificate store normally is a file containing certificates and optional private keys.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (for example, PKCS12 certificate store).

The type of key store containing the TLS/SSL client certificate.

Remarks

This property can take one of the following values:

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.

The password for the TLS/SSL client certificate.

Remarks

If the certificate store is of a type that requires a password, this property is used to specify that password to open the certificate store.

The subject of the TLS/SSL client certificate.

Remarks

When loading a certificate the subject is used to locate the certificate in the store.

If an exact match is not found, the store is searched for subjects containing the value of the property. If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks the first certificate in the certificate 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]". The common fields and their meanings are shown below.

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, it must be quoted.

The certificate to be accepted from the server when connecting using TLS/SSL.

Remarks

If using a TLS/SSL connection, this property can be used to specify the TLS/SSL certificate to be accepted from the server. Any other certificate that is not trusted by the machine is 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

If not specified, any certificate trusted by the machine is accepted.

Use '*' to signify to accept all certificates. Note that this is not recommended due to security concerns.

This section provides a complete list of the SSH properties you can configure in the connection string for this provider.

---

Property	Description
SSHAuthMode	The authentication method used when establishing an SSH Tunnel to the service.
SSHClientCert	A certificate to be used for authenticating the SSHUser.
SSHClientCertPassword	The password of the SSHClientCert key if it has one.
SSHClientCertSubject	The subject of the SSH client certificate.
SSHClientCertType	The type of SSHClientCert private key.
SSHServer	The SSH server.
SSHPort	The SSH port.
SSHUser	The SSH user.
SSHPassword	The SSH password.
SSHServerFingerprint	The SSH server fingerprint.
UseSSH	Whether to tunnel the SQL Server connection over SSH. Use SSH.

The authentication method used when establishing an SSH Tunnel to the service.

Remarks

• None: No authentication is performed. The current User value is ignored, and the connection is logged in as anonymous.
• Password: The Sync App uses the values of User and Password to authenticate the user.
• Public_Key: The Sync App uses the values of User and SSHClientCert to authenticate the user. SSHClientCert must have a private key available for this authentication method to succeed.

A certificate to be used for authenticating the SSHUser.

Remarks

SSHClientCert must contain a valid private key in order to use public key authentication. A public key is optional, if one is not included then the Sync App generates it from the private key. The Sync App sends the public key to the server and the connection is allowed if the user has authorized the public key.

The SSHClientCertType field specifies the type of the key store specified by SSHClientCert. If the store is password protected, specify the password in SSHClientCertPassword.

Some types of key stores are containers which may include multiple keys. By default the Sync App will select the first key in the store, but you can specify a specific key using SSHClientCertSubject.

The password of the SSHClientCert key if it has one.

Remarks

This property is only used when authenticating to SFTP servers with SSHAuthMode set to PublicKey and SSHClientCert set to a private key.

The subject of the SSH client certificate.

Remarks

When loading a certificate the subject is used to locate the certificate in the store.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks the first certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, [email protected]". Common fields and their meanings are displayed below.

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 it must be quoted.

The type of SSHClientCert private key.

Remarks

This property can take one of the following values:

Types	Description	Allowed Blob Values
MACHINE/USER		Blob values are not supported.
JKSFILE/JKSBLOB		base64-only
PFXFILE/PFXBLOB	A PKCS12-format (.pfx) file. Must contain both a certificate and a private key.	base64-only
PEMKEY_FILE/PEMKEY_BLOB	A PEM-format file. Must contain an RSA, DSA, or OPENSSH private key. Can optionally contain a certificate matching the private key.	base64 or plain text. Newlines may be replaced with spaces when providing the blob as text.
PPKFILE/PPKBLOB	A PuTTY-format private key created using the puttygen tool.	base64-only
XMLFILE/XMLBLOB	An XML key in the format generated by the .NET RSA class: RSA.ToXmlString(true).	base64 or plain text.

The SSH server.

Remarks

The SSH server.

The SSH port.

Remarks

The SSH port.

The SSH user.

Remarks

The SSH user.

The SSH password.

Remarks

The SSH password.

The SSH server fingerprint.

Remarks

The SSH server fingerprint.

Whether to tunnel the SQL Server connection over SSH. Use SSH.

Remarks

By default the Sync App will attempt to connect directly to SQL Server. When this option is enabled, the Sync App will instead establish an SSH connection with the SSHServer and tunnel the connection to SQL Server through it.

This section provides a complete list of the Firewall properties you can configure in the connection string for this provider.

---

Property	Description
FirewallType	The protocol used by a proxy-based firewall.
FirewallServer	The name or IP address of a proxy-based firewall.
FirewallPort	The TCP port for a proxy-based firewall.
FirewallUser	The user name to use to authenticate with a proxy-based firewall.
FirewallPassword	A password used to authenticate to a proxy-based firewall.

The protocol used by a proxy-based firewall.

Remarks

This property specifies the protocol that the Sync App will use to tunnel traffic through the FirewallServer proxy. Note that by default, the Sync App connects to the system proxy; to disable this behavior and connect to one of the following proxy types, set ProxyAutoDetect to false.

Type	Default Port	Description
TUNNEL	80	When this is set, the Sync App opens a connection to SQL Server and traffic flows back and forth through the proxy.
SOCKS4	1080	When this is set, the Sync App sends data through the SOCKS 4 proxy specified by FirewallServer and FirewallPort and passes the FirewallUser value to the proxy, which determines if the connection request should be granted.
SOCKS5	1080	When this is set, the Sync App sends data through the SOCKS 5 proxy specified by FirewallServer and FirewallPort. If your proxy requires authentication, set FirewallUser and FirewallPassword to credentials the proxy recognizes.

To connect to HTTP proxies, use ProxyServer and ProxyPort. To authenticate to HTTP proxies, use ProxyAuthScheme, ProxyUser, and ProxyPassword.

The name or IP address of a proxy-based firewall.

Remarks

This property specifies the IP address, DNS name, or host name of a proxy allowing traversal of a firewall. The protocol is specified by FirewallType: Use FirewallServer with this property to connect through SOCKS or do tunneling. Use ProxyServer to connect to an HTTP proxy.

Note that the Sync App uses the system proxy by default. To use a different proxy, set ProxyAutoDetect to false.

The TCP port for a proxy-based firewall.

Remarks

This specifies the TCP port for a proxy allowing traversal of a firewall. Use FirewallServer to specify the name or IP address. Specify the protocol with FirewallType.

The user name to use to authenticate with a proxy-based firewall.

Remarks

The FirewallUser and FirewallPassword properties are used to authenticate against the proxy specified in FirewallServer and FirewallPort, following the authentication method specified in FirewallType.

A password used to authenticate to a proxy-based firewall.

Remarks

This property is passed to the proxy specified by FirewallServer and FirewallPort, following the authentication method specified by FirewallType.

This section provides a complete list of the Proxy properties you can configure in the connection string for this provider.

---

Property	Description
ProxyAutoDetect	This indicates whether to use the system proxy settings or not.
ProxyServer	The hostname or IP address of a proxy to route HTTP traffic through.
ProxyPort	The TCP port the ProxyServer proxy is running on.
ProxyAuthScheme	The authentication type to use to authenticate to the ProxyServer proxy.
ProxyUser	A user name to be used to authenticate to the ProxyServer proxy.
ProxyPassword	A password to be used to authenticate to the ProxyServer proxy.
ProxySSLType	The SSL type to use when connecting to the ProxyServer proxy.
ProxyExceptions	A semicolon separated list of destination hostnames or IPs that are exempt from connecting through the ProxyServer .

This indicates whether to use the system proxy settings or not.

Remarks

This takes precedence over other proxy settings, so you'll need to set ProxyAutoDetect to FALSE in order use custom proxy settings.

To connect to an HTTP proxy, see ProxyServer. For other proxies, such as SOCKS or tunneling, see FirewallType.

The hostname or IP address of a proxy to route HTTP traffic through.

Remarks

The hostname or IP address of a proxy to route HTTP traffic through. The Sync App can use the HTTP, Windows (NTLM), or Kerberos authentication types to authenticate to an HTTP proxy.

If you need to connect through a SOCKS proxy or tunnel the connection, see FirewallType.

By default, the Sync App uses the system proxy. If you need to use another proxy, set ProxyAutoDetect to false.

The TCP port the ProxyServer proxy is running on.

Remarks

The port the HTTP proxy is running on that you want to redirect HTTP traffic through. Specify the HTTP proxy in ProxyServer. For other proxy types, see FirewallType.

The authentication type to use to authenticate to the ProxyServer proxy.

Remarks

This value specifies the authentication type to use to authenticate to the HTTP proxy specified by ProxyServer and ProxyPort.

Note that the Sync App will use the system proxy settings by default, without further configuration needed; if you want to connect to another proxy, you will need to set ProxyAutoDetect to false, in addition to ProxyServer and ProxyPort. To authenticate, set ProxyAuthScheme and set ProxyUser and ProxyPassword, if needed.

The authentication type can be one of the following:

• BASIC: The Sync App performs HTTP BASIC authentication.
• DIGEST: The Sync App performs HTTP DIGEST authentication.
• NEGOTIATE: The Sync App retrieves an NTLM or Kerberos token based on the applicable protocol for authentication.
• PROPRIETARY: The Sync App does not generate an NTLM or Kerberos token. You must supply this token in the Authorization header of the HTTP request.

If you need to use another authentication type, such as SOCKS 5 authentication, see FirewallType.

A user name to be used to authenticate to the ProxyServer proxy.

Remarks

The ProxyUser and ProxyPassword options are used to connect and authenticate against the HTTP proxy specified in ProxyServer.

You can select one of the available authentication types in ProxyAuthScheme. If you are using HTTP authentication, set this to the user name of a user recognized by the HTTP proxy. If you are using Windows or Kerberos authentication, set this property to a user name in one of the following formats:

user@domain
domain\user

A password to be used to authenticate to the ProxyServer proxy.

Remarks

This property is used to authenticate to an HTTP proxy server that supports NTLM (Windows), Kerberos, or HTTP authentication. To specify the HTTP proxy, you can set ProxyServer and ProxyPort. To specify the authentication type, set ProxyAuthScheme.

If you are using HTTP authentication, additionally set ProxyUser and ProxyPassword to HTTP proxy.

If you are using NTLM authentication, set ProxyUser and ProxyPassword to your Windows password. You may also need these to complete Kerberos authentication.

For SOCKS 5 authentication or tunneling, see FirewallType.

By default, the Sync App uses the system proxy. If you want to connect to another proxy, set ProxyAutoDetect to false.

The SSL type to use when connecting to the ProxyServer proxy.

Remarks

This property determines when to use SSL for the connection to an HTTP proxy specified by ProxyServer. This value can be AUTO, ALWAYS, NEVER, or TUNNEL. The applicable values are the following:

AUTO	Default setting. If the URL is an HTTPS URL, the Sync App will use the TUNNEL option. If the URL is an HTTP URL, the component will use the NEVER option.
ALWAYS	The connection is always SSL enabled.
NEVER	The connection is not SSL enabled.
TUNNEL	The connection is through a tunneling proxy. The proxy server opens a connection to the remote host and traffic flows back and forth through the proxy.

A semicolon separated list of destination hostnames or IPs that are exempt from connecting through the ProxyServer .

Remarks

The ProxyServer is used for all addresses, except for addresses defined in this property. Use semicolons to separate entries.

Note that the Sync App uses the system proxy settings by default, without further configuration needed; if you want to explicitly configure proxy exceptions for this connection, you need to set ProxyAutoDetect = false, and configure ProxyServer and ProxyPort. To authenticate, set ProxyAuthScheme and set ProxyUser and ProxyPassword, if needed.

This section provides a complete list of the Logging properties you can configure in the connection string for this provider.

---

Property	Description
LogModules	Core modules to be included in the log file.

Core modules to be included in the log file.

Remarks

Only the modules specified (separated by ';') will be included in the log file. By default all modules are included.

See the Logging page for an overview.

This section provides a complete list of the Schema properties you can configure in the connection string for this provider.

---

Property	Description
Location	A path to the directory that contains the schema files defining tables, views, and stored procedures.
BrowsableSchemas	This property restricts the schemas reported to a subset of the available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC.
Tables	This property restricts the tables reported to a subset of the available tables. For example, Tables=TableA,TableB,TableC.
Views	Restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC.

A path to the directory that contains the schema files defining tables, views, and stored procedures.

Remarks

The path to a directory which contains the schema files for the Sync App (.rsd files for tables and views, .rsb files for stored procedures). The folder location can be a relative path from the location of the executable. The Location property is only needed if you want to customize definitions (for example, change a column name, ignore a column, and so on) or extend the data model with new tables, views, or stored procedures.

If left unspecified, the default location is "%APPDATA%\\CData\\SQL Data Provider\\Schema" with %APPDATA% being set to the user's configuration directory:

Platform	%APPDATA%
Windows	The value of the APPDATA environment variable
Linux	~/.config

This property restricts the schemas reported to a subset of the available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC.

Remarks

Listing the schemas from databases can be expensive. Providing a list of schemas in the connection string improves the performance.

This property restricts the tables reported to a subset of the available tables. For example, Tables=TableA,TableB,TableC.

Remarks

Listing the tables from some databases can be expensive. Providing a list of tables in the connection string improves the performance of the Sync App.

This property can also be used as an alternative to automatically listing views if you already know which ones you want to work with and there would otherwise be too many to work with.

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 that when connecting to a data source with multiple schemas or catalogs, you will need to provide the fully qualified name of the table in this property, as in the last example here, to avoid ambiguity between tables that exist in multiple catalogs or schemas.

Restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC.

Remarks

Listing the views from some databases can be expensive. Providing a list of views in the connection string improves the performance of the Sync App.

This property can also be used as an alternative to automatically listing views if you already know which ones you want to work with and there would otherwise be too many to work with.

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 that when connecting to a data source with multiple schemas or catalogs, you will need to provide the fully qualified name of the table in this property, as in the last example here, to avoid ambiguity between tables that 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
ApplicationIntent	The application intent connection string property expresses the client application's request to be directed either to a read-write or read-only version of an availability group database. To use read-only routing, a client must use an application intent of read-only in the connection string when connecting to the availability group listener. Without the read-only application intent, connections to the availability group listener are directed to the database on the primary replica.
ApplicationName	The application name connection string property expresses the HTTP User-Agent.
IncludeSystemSchemas	This property specifies whether to query the system schemas, including 'guest' and those whose names start with 'db_'.
IncludeTableTypes	If set to true, the provider will query for the types of individual tables and views.
MaxRows	Limits the number of rows returned when no aggregation or GROUP BY is used in the query. This takes precedence over LIMIT clauses.
Other	These hidden properties are used only in specific use cases.
QueryPassthrough	This option passes the query to the SQL Server server as is.
Timeout	A timeout for the provider.

The application intent connection string property expresses the client application's request to be directed either to a read-write or read-only version of an availability group database. To use read-only routing, a client must use an application intent of read-only in the connection string when connecting to the availability group listener. Without the read-only application intent, connections to the availability group listener are directed to the database on the primary replica.

Remarks

ApplicationIntent allows you to connect to a read-only secondary when connecting to an Availability Group Listener.

The application name connection string property expresses the HTTP User-Agent.

Remarks

This property specifies whether to query the system schemas, including 'guest' and those whose names start with 'db_'.

Remarks

This property specifies whether to query the system schemas, including 'guest' and those whose names start with 'db_'.

If set to true, the provider will query for the types of individual tables and views.

Remarks

If set to true, the Sync App will query SQL Server for the types of individual tables and views.

Limits the number of rows returned when no aggregation or GROUP BY is used in the query. This takes precedence over LIMIT clauses.

Remarks

Limits the number of rows returned when no aggregation or GROUP BY is used in the query. This takes precedence over LIMIT clauses.

These hidden properties are used only in specific use cases.

Remarks

The properties listed below are available for specific use cases. Normal driver use cases and functionality should not require these properties.

Specify multiple properties in a semicolon-separated list.

Integration and Formatting

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	Determines whether to convert date-time values to GMT, instead of the local time of the machine.
RecordToFile=filename	Records the underlying socket data transfer to the specified file.

This option passes the query to the SQL Server server as is.

Remarks

When this is set, queries are passed through directly to SQL Server.

A timeout for the provider.

Remarks

If the Timeout property is set to 0, operations will not time out; instead, they will run until they complete successfully or encounter an error condition.

If Timeout expires and the operation is not yet complete, the Sync App raises an error condition.