Two changes at https://msdn.microsoft.com/en-us/library/mt589971.aspx
- In Section 1.7, Versioning and Capability Negotiation, clarified that there are three versions of the Remote Desktop Protocol: Dynamic Channel Virtual Channel Extension.
- In Section 2.2.5.1, Soft-Sync Request PDU (DYNVC_SOFT_SYNC_REQUEST), added Length, Flags, and NumberOfTunnels fields to the Length definition.