I have asked this question here before and I thought I had it fixed but it didn't seem to be the case.
I have a Windows 2003 Domain env. and have added a Windows 2008 R2 member server with the RDS server role enabled, the RDS licensing service is also installed on the same server. All Windows client were able connect to it without any problem. I added another 2008 R2 server (with RDS server role enabled) to the domain and would like use it as a backup RDS server. The problem that I am experiencing is that the newly added RDS server is unable to communicate with the first RDS server's license service and therefore it can not obtain the RDS CALs. The license server was shown in the known license servers area in the Remote Desktop Session host server configuration on the new server, but it showed as unavailable under the licensing diagnosis information area. When I manually added the license server to the license server list, it always said the license server selected is not connectable at the moment. I can ping the license server as well as access the file share of the license server. Any thought? Thanks