If a terminalserver 2008 R1 is configured for only one session per user, everything works like it should if the user connects using the 'normal' remotedesktop session. A second connect with the same credentials kicks the first connect.
If a remoteApp is used instead of the 'normal' connect, it's possible to start multiple instances of this app within one user a least from one computer. mstsc do run multiple times and seem to link in the existent connection without kicking it. How to change that?
Continuative:
The started RemoteApp checks the mutex of all started processes and stops herself if a process is found with the same mutex. This prevents multiple instances of this app within one user with the same sessionID. If a terminalserver is configured for only one session per user, this RemoteApp shouldn't start multiple within one user. Using a "normal" remote desktop session the app doesn't start more than one time, I tested it. Used as RemotApp, the app starts multiple! Possibly I'm able to change this behaviour with a code fix instead of configuring terminal services. Any tips regarding mutex and terminalservers?