Therese Hutcheson - Wednesday, April 19, 2017 11:41 AM
sp_change_users_login 'Report' will only report on orphaned users - one where the SID in the database's sys.users table doesn't match the SID in the server's master.sys.logins table. (This is from memory - might not have the table names quite right here...) See https://docs.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-change-users-login-transact-sql for more.
Thomas Rushton
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