Installing RDP 8.1 on Server 2008

I've installed the prerequisite and update for RDP 8 on a Server 2008 R2 virtual server. When I look at the About information "Remote Desktop Protocol 8.0 supported". However, the gpedit option isn't there under:

Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Remote Session Environment

What else needs installed?

Thanks!