User Account continuously disabled

Windows 2kPro waorkstations, 2000 Server network

User was in Outlook and "got kicked off" his machine. Rebooted and received "You user account has been disabled..." After initial attempt to log on (i.e., no three bad attempts). I unlock his account and try again, locked out again. After observing his account properties from Active Directory U's & C's, I see that after unlocking his account (and clicking Apply & OK) if I immediately open the Prop.s windows, the "Account disabled" field is unchecked and greyed out. If I check it again within 5 seconds, the account has been checked as disabled again. Ran virus scans but couldn't find anything.

Any ideas?

 

The account is probably corrupt. No choice I know of other than delete it and create a new one. Can be the same name/password if you want since the OS uses the security ID (SID) and will see it as a completely different user account.

To keep from losing all the user's settings, take a look at This how-to article. Written for XP but from what I read, the exact same thing should work fine with 2K.