I am setting up a Win2012 RDS environment consisting of 1 RD Web Access server (which is also Connection Broker and Licensing), and 3 Session Hosts. These are published RemoteApps, not full Remote Desktops (yet).
I am trying to create 2 collections of RemoteApps - one for the testing programs (Notepad, Paint, etc), and one for Production app (eventually there will be a 3rd collection, of training versions of that production app). So what I did was create the Testing collection, and added all 3 servers to it. Now I want to create the second collection, and add just the one main production app to it. And it seems I can't create the collection, as there are no session hosts listed. What seems to be happening is that only unassigned session hosts can be added to a collection; that I can't have all 3 of my session hosts in multiple collections. Is that right? I am trying to search for confirmation, but not finding a definitive answer. If I can have the same session host in multiple collections, how can I do that? I must be doing something wrong, but what? (I don't really need the testing collection, but I will be wanting to separate out the production app vs the training version of that same app. And eventually I may have more RemoteApps, and I would want to keep them logically separated - such as by group access, etc) Thanks for any hints.

