If you need to allow RDP multiple connection to windows 2016 server you can follow below procedure.
Be aware that alrerady installed internal RDS cal server is a prerequisite
Here they are minimal steps that need to be followed:
- Go to Server Manager in Windows Server 2016
- Click Add Roles and Features
- Then select Role-based or feature-based installation
- Choose: Remote Desktop Services
- Then choose: Remote Desktop Session Host
- Install the role
- restart server
- GDPEdit.msc
- Go to Computer Configuration -> Policies -> Administrative Templates -> Windows Components -> Remote Desktop Services -> Remote Desktop Session Host -> Connections
- Set Limit number of connections to Disable.
- Set Restrict Remote Desktop Services users to a single session to Disable.
- Set Limit number of connections to enabled 999999
- Go to Computer Configuration -> Policies -> Administrative Templates -> Windows Components -> Remote Desktop Services -> Remote Desktop Session Host -> Licensing
- Set Use the specified Remote Desktop license servers to enabled (indicate FQDN server name)
- Set the Remote Desktop licensing mode to enabled (Per User or Per Device)
- gpupdate /force
- Test multiple RDP connections
- Launch RD Licensing Diagnoser snap-in to check that everything is working properly.