Recently I upgraded a PDC to Active Directory. Now several of my co-workers can access Active Directory Users and Computers from their machines, but when I try to open it I get this error message:

Naming Information cannot be located because:
The specified domain does not exist or could not be contacted.
Contact your system administrator to verify your domain is properly configured and is currently online.

If I answer ok to this error Users and Computers will open. If I then right click on the Active Directory Users And computers in the MMC and connect to the DC I can view the contents. I can remove users from groups, but when I try to add a user to a group I get this error:

Object Picker cannot open becuase no location from which to choose objects could be found.

I have been through tech net, and did not find anything helpful.

Has anyone ever seen this?


Thanks,
Slim