Windows2012 R2 implements multiple remote desktops
Open cmd, enter gpedit.msc group policy, find [computer Settings]-- [Administrative templates]-- [windows components]-- [remote Desktop Services]-- [remote Desktop session Host]-- [connection] refuse to log out administrators who have logged in to the console session-Select to limit the number of connections-Select enable. Configure 1000 remote Desktop Services users to be restricted to separate remote Desktop Services sessions-Select disable
Finally, restart the windows server
