I have one of seven servers that is part of a Windows AD network that started giving us problems.
For some reason, some users (about 5-7 out of 25) are getting access denied messages when trying to connect to this server. This is a Win 2003 Std file server with Exchange 2003 loaded on it. It is not a DC and there are 4 DCs out there to authenticate.
There are no error messages anywhere, not on the server nor on the client.
To resolve the issue, sometimes I have to restart the computer, log in as admin, log off and log the user in. Today I had to remove one win7 pc out of the domain and rejoin. I also had to do the same on an xp and recreate the profile on the workstation.
It's very erratic on the fixes. the problem is that I can't reproduce the problem. It will happen suddenly and with no warning.