Orphaned users occur when a database user login no longer exist in the master database. This topic discusses how to identify and resolve orphaned users. Reduce the possibility of orphaned users by ...

--An orphan user is a user in a SQL Server database that is not associated with a SQL Server login ...

A Fix for Database Orphans. A common problem when restoring databases is making orphans of users. Here's a quick fix. By Eric Johnson; 10/22/2008; Because SQL Server manages SIDs for any user logging ...