A simple tutorial to show how to allow Remote Desktop Connections from all of you internal network clients to the TMG Server.
1. Go to TMG 2010 Server
2. Click Firewall Policy
3. Click Edit System Policy and System Policy Editor Window is Opened, (Find the link at Bottom Right after click Firewall Policy)
4. Click Terminal Server under Remote Management
5. Click the Tab From and ADD internal Network
6. Save the Changes and Try to access TMG through Remote Desktop from any of your internal Network Client
