Microsoft® Lync Server 2010 Unleashed

Pre-Authentication

Pre-authentication of network clients is a feature found in both Microsoft Forefront Threat Management Gateway and Microsoft Forefront Unified Access Gateway, which lets the reverse proxy authenticate a user before completing the SSL bridge back to an internal server. This way, unauthenticated traffic is not allowed to communicate with internal services, which makes the deployment more secure. Without pre-authentication, the SSL traffic is authenticated by the internal pool server. It is still inspected and filtered for malicious code by the reverse proxy, but pass-through authentication requires the internal servers to handle authentication of the requests.

Not all features of Lync Server support pre-authentication and whether ...