I was under the impression that with RDP protocol 8.1 on the local system, Windows 7 SP1 in this case if I connected to RDS running on server 2012 R2 that I would have support for USB device pass through. Such that the software running on the 2012R2 server would see the device plugged in.
I have a fairly specialized use situation where that does not appears to be occurring. In one of our science labs I am trying to replace 16 terminals that currently connect into a citrix deployment. I want to put 16 thin clients in place running Windows 7 Thin PC with RDP 8.1. I want to connect to the RDS implementation on campus and via a published remoteapp run some lab software that works with a USB lab interface. If I run the lab software on the PC I will be using as a thin client I can capture data from the USB interface. If i connect into the remoteapp instance of that lab software it does not see the lab interface that is connected to that system.
I have checked that the RDP connection checks the box for "other supported Plug and play devices and devices that I plug in later. I can connect to simple things like USB drives that are connected but this is the first acutal USB device I have tried to interface with.
In testing I can connect my android phone to the local PC and see it as a drive resource in a remote app.