Explanation:

Scenario: Authenticate database users by using Active Directory credentials.
The configuration steps include the following procedures to configure and use Azure Active Directory authentication.
* Create and populate Azure AD.
* Optional: Associate or change the active directory that is currently associated with your Azure Subscription.
* Create an Azure Active Directory administrator. (Step 1)
* Configure your client computers.
* Create contained database users in your database mapped to Azure AD identities. (Step 2)
* Connect to your database by using Azure AD identities. (Step 3)
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/authentication-aad-overview