RDP Remote Desktop Configuring Remote Session UAG
The issue was caused by two DNS records. If the server has multiple NICS such as proxy or UAG\TMG servers and all NICS register in DNS, RDP does not work. Ensure that you uncheck "Register this connection's addresses in DNS" in the NIC properties.
James Chong (MVP)
MCITP | EA | EMA; MCSE | M+, S+
Security+, Project+, ITIL