In windows server 2008r2 the Remote Desktop Service Manager allows you to add multiple servers to a group so that you can see what user is connected to each server, then from the list of users you can get the status of them to see their "client name" (which machine they are connected from).
In server 2012 R2 they have "Server Manager->Remote Desktop Services>Collections" that will show me which users are connected to which collection/server, but no way to find out what the client is without logging into the system and opening up Task Manager and then adding the "Client Name" column to the "Users" tab. Is there a better way to do this?