We have about 50 RDS servers running on Windows 2008r2. These are all virtual machines running within VMWare ESXi 5.5. Some are configured in a farm and others are "stand-alone". All are in a single domain environment and we have no issues logging in and working. BUT, at random times, users will "lose" their sessions. Not the normal "session has disconnected, we will try to connect x number of times" that you see if there is a connectivity problem. When the connection/session is "lost" the RDP client just closes immediately. Clients PCs are running on a mix of XP and Windows 7. Does not seem to be any rhyme or reason on which machines or users this happens to. Have found nothing relative in the server or client logs. It's not a keep-alive issue, you can be actively typing when this occurs. Some times we can go for a day or two with no disconnects and sometimes some users will be disconnected 8-10 times a day. This seems to happen at random - one user may be disconnected one time and everyone else is fine. The next time it may be 10 sessions. Haven't been able to tie it to a single farm, group of servers, group of users, time of day, or group of PCs. Any ideas?
Thanks!