Microsoft® Lync® Server 2013 Unleashed Second Edition

Internal Endpoint Sign-In Process

Before you review the benefits of a Director, it is important to first understand how an internal Lync client actually signs in. Clients default to searching DNS for service locator, or SRV, records based on the SIP address a user entered. Multiple SRV records can be returned, each with a different weight and priority so that a client can select the most preferred record. In the case of Lync 2013 the client will select the record with the lowest numeric priority and the highest numeric weight.

There is no logic in an endpoint to indicate that it is initially connecting to a Director pool and not a Front End server, meaning that the same DNS records, authentication methods, and signaling are used from the endpoint’s ...