Remote Desktop session host role

Greetings,

    I have a valid, configured license server with 100 per user CALS - Lets call it serverL.

  I want to RDP to ServerX and I want ServerX to get a license from serverL.

   Do I do this by targeting a group policy to serverX specifying the serverL as the license server and specifying the license mode?

  Do I also need to install the Remote Desktop Session Host role on ServerX?

  What about the broker role?

Thanks

David Z