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DNS Setup

In order for the Skype for Business client to auto-discover our Skype for Business cloud, you'll need to set the following DNS addresses in your public and private DNS servers.

Skype for Business Autodiscover

_sip._tls.example.com

Type SRV
Service _sip
Protocol _tls
Port 443
Weight 1
Priority 100
Name example.com
Target sip.lync.unifiedcaas.net

Skype for Business Federation

_sipfederationtls._tcp.example.com

Type SRV
Service _sipfederationtls
Protocol _tcp
Port 5061
Weight 1
Priority 100
Name example.com
Target sip.lync.unifiedcaas.net

Skype for Business Mobile Autodiscover

lyncdiscover.example.com

Type CNAME
Name lyncdiscover.example.com
Target web.lync.unifiedcaas.net

Migrating from Skype for Business Online

If you are migrating from Skype for Business Online (Office 365), you will have to CNAME record sip.example.com pointing towards sipdir.online.lync.com, please remove this record completely. We do not use this method of sign in.

Ready to Check the new entries?

Once you are ready, visit our DNS records checker site, found here: https://dnscheck.joinvia.com

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