This type of CAL is assigned to devices connecting to Windows Server 2008 or %WINDOWS_SHORT% Remote Desktop Session Host ...

This type of CAL is assigned to devices connecting to Windows Server 2008 or %WINDOWS_SHORT% Remote Desktop Session Host servers or to devices connecting to a Remote Desktop Virtualization Host servers. Ensure that the licensing mode on the RD Session Host server or RD Virtualization Host server is set to Per Device.