Following testing scenario:
- All in one RDS Server (Broker, Host, Licensing and WebAccess)
- Two identical ThinClients with two connected USB audio devices (Lync Phone Edition and USB-Soundcard) - UserA and UserB
- RemoteFX USB redirection enabled
- no GPOs except RemoteFX are set for testing purposes
So if the first UserA logs in, everything seems fine. RemoteFX devices are redirected and both audio devices are set as default (soundcard as default audio and LPE as default communication device) After UserB logs in, his devices are also redirected and set as default - no problems at all. But at the same time as UserB logs in, the default Audiodevices of UserA are unset. If i set the default audio devices manually for UserA, they are unset for UserB.
I have made the same testing on Server 2016 - no such Problems.
We had the same scenario running in productive enviroment on Server 2012R2 for about 5 years, this issue didnt occure.