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One of the first things to do when preparing for your XenDesktop installation is to configure the infrastructure services, in this case, licensing. XenDesktop 5.6 requires that you have a licensing server version 11.9 or higher. If you have an existing site or XenApp farm you may already have a License Server, but make sure that it is 11.9 or upgrade it.
Once installed the server will listen on TCP ports 7279, 8082 and 27000
Express Edition allows for free licenses but limit the amount of connections and the flexibility of the product. The PoC system installs with Express Edition Licences. Unlike XenApp Microsoft RDS licenses are not required for desktop connections.