On the remote machine, go to the Local Group Policy Editor and add the necessary user/group to:
Computer Configuration/Windows Settings/Security Settings/Local Policies/User Rights Assignment/Allow log on through Remote Desktop Services.
Computer Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Connections
Restrict Remote Desktop Services users to a single remote session 1
Special:
6565790, 6565796, 6565797, 6565796, 6565802, 6565803, 6565808, 6565811, 6565821, 6565822, 6565833, 6565835, 6565836, 6565842.
