Azure SQL Server

@Fernando Gutierrez Thank you for reaching out.

Specifies the Microsoft Entra principal for which the database user is being created. The Microsoft_Entra_principal can be a Microsoft Entra user, a Microsoft Entra group, or a Microsoft Entra application. (Microsoft Entra users can't have Windows Authentication logins in SQL Database; only database users.) The connection string must specify the contained database as the initial catalog.

For Microsoft Entra principals, the CREATE USER syntax requires:

UserPrincipalName of the Microsoft Entra object for Microsoft Entra Users.

• CREATE USER [bob@contoso.com] FROM EXTERNAL PROVIDER;
  • CREATE USER [alice@fabrikam.onmicrosoft.com] FROM EXTERNAL PROVIDER;
  Microsoft Entra server principals (logins) introduces creating users that are mapped to Microsoft Entra logins in the virtual master database. CREATE USER [bob@contoso.com] FROM LOGIN [bob@contoso.com]

https://video2.skills-academy.com/en-us/entra/identity/authentication/tutorial-enable-azure-mfa

https://video2.skills-academy.com/en-us/sql/t-sql/statements/create-user-transact-sql?view=sql-server-ver16

Use the syntax extension FROM EXTERNAL PROVIDER to create server-level Microsoft Entra logins in Azure SQL Database and Azure SQL Managed Instance. Microsoft Entra logins allow database-level Microsoft Entra principals to be mapped to server-level Microsoft Entra logins. To create a Microsoft Entra user from a Microsoft Entra login use the following syntax:

CREATE USER [Microsoft_Entra_principal] FROM LOGIN [Microsoft Entra login]

When creating the user in the Azure SQL database, the login_name must correspond to an existing Microsoft Entra login, or else using the FROM EXTERNAL PROVIDER clause will only create a Microsoft Entra user without a login in the master database. For example, this command will create a contained user:

CREATE USER [bob@contoso.com] FROM EXTERNAL PROVIDER

Please let us know if you need more clarification

Regards,

Oury