Changes to remote administration in Windows Server 2008 and Windows Server 2008 R2
In Windows Server 2003, you can start the RDC client (Mstsc.exe) by using the /console switch to remotely connect to the physical console session on the server (also known as session 0). In Windows Server 2008 or Windows Server 2008 R2, the /console switch has been deprecated. For more information, see the “Why the /console switch is no longer needed” section. In Windows Server 2008 and Windows Server 2008 R2, session 0 is a noninteractive session that is reserved for services.
You can use the new /admin switch to remotely connect to a Windows Server 2008-based server for administrative purposes. The /admin switch is introduced in RDC 6.1. RDC 6.1 is included in the following operating systems:
Windows Server 2008
Windows Server 2008 R2
Windows Vista Service Pack 1 (SP1)
Windows XP Service Pack 3 (SP3)
Note RDC 6.1 (6.0.6001) supports Remote Desktop Protocol (RDP) 6.1.
RDC 6.1 does not support the /console switch. However, for backward compatibility, you can use the /admin switch to connect to the physical console session on a Windows Server 2003-based server. For example, to connect from a Windows Vista SP1-based client to the physical console session of a Windows Server 2003-based server, run the mstsc.exe /admin command.