We recently added a Win2000 server into our stable of 8 other NT4 servers (all into the same domain). We successfully synchronized our current domain users with the new 2000 server, which, of course, has become the primary PDC. However, we cannot add any new domain users. We have tried adding them through the active server pages on the Win2000 PDC as well as via the user manager program from all the WinNT4 servers. The user names propagate out to all the user manager tables when added from each server, including showing up in the active server pages when added from an NT4 user manager screen, but when we try to logon to the domain using the new logon, we get "username not found." We can change passwords successfully on the older accts, etc, but cannot add new users. We had no problems adding users prior to adding the Win2000 server. We have researched this extensively but cannot find any info on it. Any help would be appreciated!!