Pre-Authentication
Pre-authentication is a feature that 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 pre-authentication can be leveraged depends greatly on business requirements.
Specifically, if anonymous remote access is ...
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