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Domain Name System (DNS) Infrastructure Support

 

Topic Last Modified: 2011-12-02

Microsoft Lync Server 2010 communications software requires Domain Name System (DNS) and uses it 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 associate the simple URLs for conferences with the servers hosting those conferences.

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

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

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

  • For DNS load balancing.

Note

Lync Server 2010 does not support internationalized domain names (IDNs).

Important

The name you specify must be identical to the computer name configured on the server. By default the computer name of a computer that is not joined to a domain is a short name, not a fully qualified domain name (FQDN). Topology Builder uses FQDNs, not short names. So, you must configure a DNS suffix on the name of the computer to be deployed as an Edge Server that is not joined to a domain. Use only standard characters (including A–Z, a–z, 0–9, and hyphens) when assigning FQDNs of your Lync Servers, Edge Servers, and pools. Do not use Unicode characters or underscores. Nonstandard characters in an FQDN are often not supported by external DNS and public CAs (that is, when the FQDN must be assigned to the SN in the certificate). For details about adding a DNS suffix to a computer name, see Configure DNS Records for Edge Support.