How the client finds and accesses services in Lync Server 2013

For all clients except for the Lync Windows Store app During DNS lookup, SRV records are queried and returned to the client in the following order:

  1. lyncdiscoverinternal.<domain>   A (host) record for the Autodiscover service on the internal Web services
  2. lyncdiscover.<domain>   A (host) record for the Autodiscover service on the external Web services
  3. _sipinternaltls._tcp.<domain>   SRV (service locator) record for internal TLS connections
  4. _sipinternal._tcp.<domain>   SRV (service locator) record for internal TCP connections (performed only if TCP is allowed)
  5. _sip._tls.<domain>   SRV (service locator) record for external TLS connections
  6. sipinternal.<domain>   A (host) record for the Front End pool or Director, resolvable only on the internal network
  7. sip.<domain>   A (host) record for the Front End pool or Director on the internal network, or the Access Edge service when the client is external
  8. sipexternal.<domain>   A (host) record for the Access Edge service when the client is external

The Lync Windows Store app changes the process completely because it uses two records:

  1. lyncdiscoverinternal.<domain>   A (host) record for the Autodiscover service on the internal Web services
  2. lyncdiscover.<domain>   A (host) record for the Autodiscover service on the external Web services
Advertisements
This entry was posted in Microsoft Lync. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s