A: Numerous roles make up Remote Desktop Services (RDS), such as session host, virtualization host, connection broker, web access, and gateway. The RDS roles between Windows Server 2012 and Windows Server 2008 R2 can't be part of a single RDS implementation. For example, the Windows Server 2012 Remote Desktop Services Connection Broker can't provide brokering services for a Windows Server 2008 R2 Session Host or Virtualization Host (for VDI).

There is one exception: A Windows Server 2012 Remote Desktop Web Access server can be part of a Windows Server 2008 R2 RDS environment.