December 9 2010

Add SRV record for Lync to Unix BIND DNS

Recently I need to add the _sipinternaltls SRV record for Lync to a DNS server running BIND on Unix (same process for _sipexternaltls). After reading through this article – – I found that it wasn’t too hard – just needed to add the following line to the db.zonename file: SRV 0 0 5061

In my case I pointed the SRV record to an A record – that had the IP address of the internal Lync pool. I did it this way because otherwise you will get an error on your Lync client stating Lync cannot verify that the server is trusted for your sign-in address. Connect anyway?. More about this error here –

Don’t forget to restart BIND so it reloads your DB file.


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Posted December 9, 2010 by danovich in category "OCS / Lync

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