This started with regular event errors Userenv 1030 and 1058, and MSExchangeSA errors 9143 and 9047.
Only 1 Windows 2003 Standard server, which runs Exchange 2003 for now, soon to migrated to a new server
There are no failures in NetDiag or DCDiag.
GPOTool, returns Error: DC List is empty on the server.
GPOTool from a workstation, works, but returns a version mismatch for 2 of 2 policies.
Group Policy Management errors with Network Path not found. However GPM from a workstation works.
FQDN access \\<domain>\sysvol\<domain>\policies fails from the server, however, works from a workstation.
I'm at a loss, and ideas.