We have about 8 Terminal Servers on 2008 R2 and we are running a third party app called TSPlus. TSplus works like Remote App where you run just the application through Terminal Services and not the whole desktop. Users are complaining that when they bring another program to the foreground such as office apps or internet it disconnects their session to the Terminal Server. When they reconnect everything is still there but they don't like getting disconnected and they are throwing a fit. I have around 450 on 8 Terminal Servers. We tried changing a couple of GPO's such as "Configure Keep-alive connection interval" but that didn't fix it.