Microsoft® Lync® Server 2013 Unleashed Second Edition

SRV Records

The main point of a Director pool from an internal perspective is that it serves as the central point of sign-in and authentication in a deployment. After a Director is installed, clients will not automatically use it, so the SRV records for each SIP domain must be changed to point to the Director pool instead of a Front End pool. After the SRV records have been updated, any new client sign-ins will locate the Director, attempt sign-in, and ultimately be redirected to their primary registrar.

An issue with the architecture of Office Communications Server 2007 was that only a single DNS SRV record was used by clients. If a Director was in use, the SRV record would typically point to it to ensure that users signed in to a Director first ...