For RD Licensing to function correctly, an RD Session Host server must be configured correctly to contact an available license ...

For RD Licensing to function correctly, an RD Session Host server must be configured correctly to contact an available license server and to obtain Remote Desktop Services client access licenses (RDS CALs). The licensing mode that you configure on the RD Session Host server must match the type of RDS CALs that you have purchased and installed. Additionally, you must specify a license server for your RD Session Host server to use.