Step 1: Set up the Active Directory Admin for AzSQL1.Step 2: Connect to DB1 by using the server administrator.Sign into your managed instance with an Azure AD login granted with the sysadmin role.Step 3: Create a user by using the FROM EXTERNAL PROVIDER clause.FROM EXTERNAL PROVIDER is available for creating server-level Azure AD logins in SQL Database managed instance. Azure AD logins allow database-level Azure AD principals to be mapped to server-level Azure AD logins. Tocreate an Azure AD user from an Azure AD login use the following syntax:CREATE USER [AAD_principal] FROM LOGIN [Azure AD login]Reference:https://docs.microsoft.com/en-us/sql/t-sql/statements/create-user-transact-sql