SQL SERVER Enterprise Manager Login Name Blank

In SQL Server Enterprise Manager > Database > (Database Name) > users
I have a user that has a blank LOGIN NAME.  I need to associate this with one of our domain accounts.  

At one point in time this Database user was associated with a domain account.  The domain account was deleted at one point.  Since then I recreated the account and would like to reassociate the db user with this nt account.  

I tried deleting the user on the database level and readding by going to Enterprise Manger > Security.  It adds the user ok but the LoginName still turns out blank.
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9413systemsAsked:
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Chris MangusConnect With a Mentor Database AdministratorCommented:
You also need to delete the user at the database server level...Enterprise Manager > Security.  Then, re-add the account.

If you delete a domain account and don't take it out of SQL Server it will be an orphan account.  SQL Server matches domain account on the SID, not the user name.  If you create a new account on your domain with the same name as the old one it gets a new, unique SID.
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9413systemsAuthor Commented:
Is there any way to associate a orphan account with a new windows account??
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Chris MangusConnect With a Mentor Database AdministratorCommented:
For SQL logins, yes, for domain logins, no.  For domain accounts you always have to drop and recreate the account in SQL Server because of the SID issue.

With SQL logins you'd use sp_change_users_login 'AUTO_FIX','username'
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