Hi
I had this issue a month ago and after spending a day trying to fix it I gave up and rebuilt the server. I had my RDS server built and functioning for 6 months until one day it started taking up to an hour for people to logon on to it, looking at the even logs the only event being logged was the GPClient is taking a long time to handle the logon request and this happend even when trying to logon locally. Rebooting the server didn't solve it, removing the network cables brought the server up so I could logon locally, however plugging the network cables back in instantly slowed the server down and went back to the same message in the event log of the GPClient is taking a long time to handle the request.
Come forward a month and everything was working fine once again until yesterday where a user came to say that they couldn't logon. The message they were getting was "The task you are trying to do can't be completed because Remote Desktop Services is currently busy. Please try again in a few minutes. Other users should still be able to log on." Which was true, because I could logon to the server no problem. I decided to restart the server and the server hung (matching http://support.microsoft.com/kb/2601888). A Hard reboot later I am having the same issue as I was having last month with the event log logging the GPClient is taking a long time to handle the logon request. This time, I removed Sophos, disbanded the network team, uninstalled all the network cards from device manager, reinstalled the network cards, connected a single port on the internal network card to the switch, reallocated the static IP, reinstalled Sophos and the server started functioning normally again. It worked fine from last night until 12PM today at which point the logon time jumped from near instant to 20 minutend gradually getting longer, again the GPClient is taking a long time to handle the request. This time I rebooted my core switch and everything started to work again, apart from a few Group Policies being listed in the event log as causing problems and would not be reapplied until the server had been rebooted.
Rebooting the server successfully applies the policy.
The only common link between each time it has happend is it is the GPClient service causing the problem by taking a long time to handle the request. Occaisionally, my proxy settings aren't being applied by the GPO, but normally login off and back on again fixes this so it suggests something is going on with Group Policy, but how can I begin to work that out when it keeps working fine for ages?
Server is fully upto date and has SP1 installed, as it stands at the moment I'm ready to smash it up!
Any help, diagnostics, advice appreciated.
