Why does this happen/?

Make sure that you are logging on to the Domain and not the local PC. If you are not logged onto the Domain, the Domain user accounts and groups that you add to a workstation will appear as numbers.

The large number is the SID for the user account you are adding. The icon for it (to the left of the SID) is of an outline of a person with a maroon question mark in it, right?
That happens sometimes. If you delete a user account without removing it from permissions on a machine, when you later view the permissions on the machine, you will see this.
The machine you are doing this add user with (using AD Users & Computers, I take it) is having a little trouble getting full browsing from the domain controller.
Now, even though the user name did not resolve, the SID was added to the Domain Admins group, so the user should then have Domain Admin powers. You see, users are only the numbers of the SID; they aren't actual names! Only numbers.
So, eventhough the user's login name did not resolve, their SID was added, so that should work.
The user should have Domain Admin rights.

hope this helps

this is an "interface problem". i werk for a large company (50,000+ users), and during our migration to an Active Directory environment, we have encountered many such "interface problems". But don't you worry one bit!! Microshaft has assured us that they are aware of these problems and are werking around the clock to resolve these issues.

sorry i can't be any help whatsoever...

K

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