Windows 2000: Slow sync of profile when any user logs off.: "
Do you use offline files? This is most likely what is causing SO much time logging off as it makes a copy of the user's document folder on the server locally. If your documents are large . . . well . . . not only can it take a great deal of time, but it can also completely fill the hard drive. If you are not wanting to use them (and you probably shouldn't for the reason I stated above), you should turn them off.
The settings for this are under you domain policy, both USER and COMPUTER policies, Administrative Template--Network--Offline Folders. Set all of the applicable setting to disable this feature.
You should/can open the hard drive (with my computer or explorer) and browse to the share on your server. Again . . . do this from the server. Right-Click the shared folder and go to properties-->Sharing tab-->Caching button--> and set the share to 'files or programs from the share will not be available offline'"