Following KBs that related to Windows 7 & Windows Server 2008 R2 are released:

2574819 An update is available that adds support for DTLS in Windows 7 SP1 and Windows Server 2008 R2 SP1

2592687 Description of the Remote Desktop Protocol 8.0 update for Windows 7 SP1 and Windows Server 2008 R2 SP1

Regards,

Content Team