Domain Name System (DNS) requirements for Lync Server 2013

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Topic Last Modified: 2012-06-18

To deploy Lync Server, you must create Domain Name System (DNS) records that enable the discovery of clients and servers, and, optionally, support for automatic client sign-in if your organization wants to support it.

Lync Server uses DNS in the following ways:

  • To discover internal servers or pools for server-to-server communications.

  • To allow clients to discover the Front End pool or Standard Edition server used for various SIP transactions.

  • To allow unified communications (UC) devices that are not logged on to discover the Front End pool or Standard Edition server running Device Update Web Service, obtain updates, and send logs.

  • To allow external servers and clients to connect to Edge Servers or the HTTP reverse proxy for instant messaging (IM) or conferencing.

  • To allow external UC devices to connect to Device Update Web service through Edge Servers or the HTTP reverse proxy and obtain updates.

  • To allow mobile clients to automatically discover Web Services resources without requiring users to manually enter URLs in device settings.