I work for a very small school. We have a Dell server running Windows 2003. Everything was just peachy until we were gone for Christmas break. After break, we started having problems with our user profiles. Many users get a message that the roaming profile is not available, they will be logged on with the local profile. Then when it can't find a local profile, they get a message about being logged on with a temporary profile and it logs them on but none of their stuff is there. Ironically, however, it knows their full name (i.e. the name listed in their network profile, not just their user name) and they can browse the network fileserver. For one user, I created a new profile for her account but now it doesn't sync with the server on log off.
Several other users have had their accounts log them on and then immediately log them off. It happens no matter what client computer they use. I have deleted their profiles and user accounts and recreated them and it still happens.
Any clues to what is going on would be greatly appreciated. We are behind a firewall with intrusion/anti-virus/etc. prevention so that doesn't seem like a likely scenario but it is possible.