Have you tried to adjust Resolution settings on PocketCloud?
Press and Hold Computer Name in My Computers screen
In Resolution drop down list choose resolution you want to use or Automatic
Tried automatic first, the app I run likes to run in 1024 x 768 so in auto it is off the screen and I can't move it to get to the buttons. If I force 1024 x 768 then pinch to shrink the screen it is usable but does not fill the screen horizontally. Autoscaling to use the tablets full screen would be useful, this would mean allowing unequal scalling of vertical and horizoneye. I believe RDP will handle this if you pass the custom Res during connection.
Thank you. We are working on the issue with unequal scaling of portrait and landscape format.
For now if you want to use PocketCloud in Landscape format, then you need to connect to remote desktop being in landscape format. It will use entire screen then.