Sound for Remote Desktop does not require any configuration.
Being installed on user and server computers it allows using local sound devices (like microphones or headsets) in remote RDP session.
Note: Sound for Remote Desktop Workstation must be installed on the local PC, Sound for Remote Desktop Server must be installed on the Terminal Server.
It's very easy to check that all works fine. Just launch Sound Recorder in remote RDP session and try to record voice data via microphone.
If Sound Recorder recognize voice, all works fine.