I guess some hooks needed to be added to support the current revision of RDP on Windows Phone because we recently released a Preview build of Remote Desktop exclusively for Windows Phone 8.1 users.
With the Microsoft Remote Desktop app, you can connect to a remote PC and experience the power of Windows with RemoteFX in a Remote Desktop client designed to help you get your work done wherever you are. Features
- Rich multi-touch experience with remote desktop protocol (RDP) and RemoteFX supporting Windows gestures
- Secure connection to your data and applications with breakthrough Network Level Authentication (NLA) technology
- Simple management of all remote connections from the connection center
- High quality video and sound streaming with improved compression and bandwidth usage
- BETA: Remote Desktop for Windows Phone PREVIEW for Windows Phone 8.1
http://www.windowsphone.com/en-us/store/app/microsoft-remote-desktop-preview/299b09ab-207e-441c-9e8e-c8d66c20b76b
kurtsh
Kurt Shintaku's Blog 