||: It's possible to run 2 administrative sessions including the console session and also
it does not require Remote Desktop Client Access Licenses (RD CALs).
|Per User mode
||: It requires an RD CAL for each unique user.
|Per Device mode
||: It requires an RD CAL for each unique device.
It needs to order RD CALs if you will use on per User mode or per Device mode.
By default, Windows Server restricts to a single RDP session as well as Client Windows OS but it's possbie to set 2 sessions like follows.