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Configuring DNS for Microsoft Office 365 Lync

You are using Microsoft Office 365 with your own domain. You need both the mobile and desktop Microsoft Lync clients to connect without users having to specify servers.


You need to create the following CNAMEs in your public DNS, and any internal DNS servers that are authoritative for your domain:

  • sip.your-domain.com CNAME sipdir.online.lync.com
  • lyncdiscover.your-domain.com CNAME webdir.online.lync.com

After DNS has propagated, both the mobile and desktop clients should connected immediately with your Office 365 credentials.


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