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Orphaned users in SQL Server

This article will help you to identify #Orphaned #Windows #Logins and Groups in #SQL Server.
To Resolve an Orphaned User:
To map an orphaned user to a login which already exists in master, execute the ALTER USER #statement in the user database, specifying the login name.
ALTER USER <user_name> WITH Login = <login_name>; When you recreate a missing login, the user can access the database using the password provided.
To fix orphaned users for all databases in SQL Server:
1. Login with same name as user exists – generate ALTER LOGIN to map the user to the login.
2. No login with same name exists – generate DROP USER to delete the orphan user.
3. Orphan user is [dbo] – change the database owner to SA (or whatever SA was renamed to).

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