A co-worker of mine was recently assigned a new laptop with the Windows 8 OS.
For a support case, she needed to VPN in and, then, use the Remote Desktop Connection (RDP) to a SQL server. RDP would not get her to the authentication/sign on screen, though.
But, when she used a Windows 7 laptop, she was able to get to the authentication screen.
What needs to be enabled, then, on Windows 8 for you to RDP from a Windows 8 laptop to another environment?