I have installed the Microsoft remote desktop app from the Google play store, and ran it while I was at home, and it worked fine; I have a wireless cable modem router, so I added and configured a gateway to my modems IP address, and setup a remote desktop connection to the local IP that my system had on the router. I made sure that the system was configured to accept remote connections, and tried the remote connection, and it worked! At least, as long as my tablet was connected to my wireless cable modem. As soon as I tried to connect from a different hotspot, the connection failed.
How am I supposed to configure this app to remote in from any hotspot? It's useless to me if I can only remote in while I'm at home.