Instructions provided describe how to re-synch SQL Server logins with the database users after restoring a database from backup.
The following code will show all the users which orphaned.
EXEC sp_change_users_login 'Report';
The following will fix the issue.
If there is already login which can be mapped to database user to, run the following (first instance of ‘db_login1’ is the user in the database, the second instance is the login to be mapped to):
EXEC sp_change_users_login 'update_one', 'db_login1', 'db_login1';
