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Lync 2010 DNS & SRV records

Posted on 2011-09-14
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Last Modified: 2012-05-12
Hi there,

I've just installed Lync Server 2010 Standard on a test VM and then Lync Edge Server on another VM.  Following this I'm trying testing connectivity with www.testocsconnectivity.com which keeps failing with the following error:


Testing the Remote Connectivity of user henry@csl.local to the Microsoft Lync Server.

Specified Remote Connectivity test(s) to Microsoft Lync Server failed. Please examine below details of specific reason for failure.

Additional Details

Failed to autodiscover. SRV Records: _sipinternaltls._tcp.csl.local _sip._tls.csl.local _sipinternal._tcp.csl.local _sip._tcp.csl.local and A records: sipinternal.csl.local sip.csl.local sipexternal.csl.local for domain of user henry@csl.local



I'm struggling with the concept of where to put these records and where to point them.  Do they need to be on my ISP's DNS Server or on my local (internal) DNS server?  Also, what port numbers am I supposed to be using and where am I supposed to be pointing them?

I'm currently adding them to my internal DNS server following the following principle:  http://technet.microsoft.com/en-us/library/gg398680.aspx

Any help would be much appreciated.

Cheers, Andy
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Question by:andrewprouse
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jayca earned 2000 total points
ID: 36549922
I am assuming your SIP domain name will be CSL.com and not local unless this is a lab...

For internal only you need a DNS zone that matches the name of your SIP domain: CSL.local

You should go into that DNS zone, create an SRV record of _sipinternaltls._tcp.CSL.local and point it to the FQDN of the std edition server.

IF your AD domain does not match the SIP domain (most don't), then do the following:
--You should go into that DNS zone, create an SRV record of _sipinternaltls._tcp.CSL.local and point it to an A record called SIP.CSL.local.  The A record should point to the IP of the std edition or pool IP.

Again in the scenario where you should match your SIP domain to the SMTP mail domain, then let's use CSL.com as an example:
---You should go into that DNS zone, create an SRV record of _sipinternaltls._tcp.CSL.com and point it to an A record called SIP.CSL.COM which resolved to an IP for the std edition or pool IP.
**Note in this example assume the AD domain is CSL.local.

Make sense?  If not, you really should run the Lync 2010 Planning Tool, it will output the exact DNS and Certs your scenario will require on the administrative output tab.

Summary:
-Decide ont he SIP domain first (match SMTP/mail domain name)
-Then configure either scenario 1 or 2 listed above in the DNS zone matching the sip domain name.
-Ensure client is set to automatic config


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