Symptom:

The RD session host server is installed properly

The RD licensing server service is also configured properly

however, I cannot access the RD server from a client computer, because a dialog box appear “The remote session was disconnected because there are no Remote desktop license servers available to provide a license”

Workaround:

http://www.360ict.nl/blog/no-remote-desktop-licence-server-availible-on-rd-session-host-server-2012/

Also:

TCP 135 + RPC dynamic ports must be opened between the new RDS Server and the RDS licensing service server

And

when specifing a RDS licensing service server, use are obliged to use the real server name because a DNS alias is not supported

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