COM Port redirection does not seem to work on Server 2016 when using RD Connection Broker. All the other redirects do work.
In the Group policies on the domain. "Do no allow COM port redirection" is set to disabled.
The ClientDeviceRedirectionOptions in the session collection show ComPort being enabled.
Also the redirectcomports:i:1 is present in the .rdp file.
On another machine, based on the same VM,which does not have the RD connection Broker role configured the COM Port redirection works flawlessly.
I would like to understand why COM port redirection does not work on the first system. What can i do to diagnose the issue and get it running?