I was looking for a local antivirus solution for a Windows 2003 server so I tried Immunet 3. Four clients are connected via remote desktop and every client has an installed (local) printer which is installed in rd enviroment.
Everything was working until I installed Immunet. After installation no one of the clients was able to access to its printer when they connected to the server. Each client says that the printer queue is not available and it couldn't (re)start the queue. Then I removed Immunet, restarted the server and the problem was gone.