Lync 2013 – DNS Settings

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If you are setting up Lync Server for the first time or have been running Lync Server, you will notice that Lync depends heavily on DNS records.  In many cases, a Lync deployment cannot be setup correctly without using a split-dns setup and using a masked UPN; which can make things even more tricky.  Here is a complete listing of DNS records I used to deploy Lync 2013.  I have verifed federation works properly, IMs, conferencing, dial-in meetings, mobile and desktop client sign-in, and desk phones.  Note, records indicated in Red are records that are required/standard in every lync deployment.

Internal DNS Records

Record Type Value Points to
A lyncdiscoverinternal.mydomain.com Lync front end server
A lyncdiscover.mydomain.com Lync reverse proxy
(needed for mobile devices to work interally)
A lync.mydomain.com Lync front end server
A sip.mydomain.com Lync front end server
(multiple A records if enterprise pool)
A dialin.mydomain.com Lync front end server
A meet.mydomain.com Lync front end server
SRV _ntp._udp.mydomain.com Domain Controller/Time Server
SRV _sip._tls.mydomain.com sip.mydomain.com
SRV _xmpp-server._tcp.mydomain.com sip.mydomain.com
SRV _sipinternaltls.mydomain.com sip.mydomain.com
SRV _sipfederationtls.mydomain.com sip.mydomain.com

**Note, you should have A records for all of the hosts in your Lync deployment (front end servers, pools, proxies, etc.).  Those are not covered in the list as they are 100% user defined when deploying Lync.

External DNS Records

Record Type Value Points to
A webconf.mydomain.com Edge server IP as specified in setup wizard
A av.mydomain.com Edge server IP as specified in setup wizard
A sip.mydomain.com Edge server IP as specified in setup wizard
A meet.mydomain.com Lync Reverse Proxy IP
A dialin.mydomain.com Lync Reverse Proxy  IP
A lync.mydomain.com Lync Reverse Proxy IP
A lyncdiscover.mydomain.com Lync Reverse Proxy IP
SRV _sip._tls.mydomain.com sip.mydomain.com
SRV _sipfederationtls._tcp.mydomain.com sip.mydomain.com
SRV _xmpp-server._tcp.mydomain.com sip.mydomain.com

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