Setting up DNS records with Skype for Business

This article describes how to set up DNS for the Skype for Business offering from Thexyz with both Office 365 and Microsoft Exchange. Please refer to either Office 365 or Exchange guides for setting up DNS. If you are unsure about this, please contact support for assistance.

If you are using Skype for Business with Office 365, you can use the records in the tables below.

Office 365 Skype for Business

TypeHostnameDestinationTime to live (TTL)
CNAME autodiscover.example.com autodiscover.outlook.com Lowest possible
CNAME lyncdiscover.example.com webdir.online.lync.com Lowest possible
CNAME sip.example.com sipdir.online.lync.com Lowest possible
TypeHostDestinationServiceProtocolPort 
SRV example.com sipfed.online.lync.com _sipfederationtls  _tcp 5061 5061
SRV example.com sipdir.online.lync.com _sip _tls 443  

If you know exactly which Exchange environment your domain is hosted on, you can locate your specific records in the tables below. If you are not sure on the version of Exchange server you are using. The email help setup tool will be able to tell you.

mex06.emailsrvr.com

TypeHostnameDestinationTime to live (TTL)
CNAME autodiscover.example.com autodiscover.emailsrvr.com Lowest possible
CNAME lyncdiscover.example.com lyncdiscover.mex06.emailsrvr.com Lowest possible
CNAME sip.example.com sip.mex06.emailsrvr.com Lowest possible
TypeHostDestinationServiceProtocolPort 
SRV example.com lync01.mex06.emailsrvr.com _sipfederationtls   _tcp 5061
SRV example.com sip.mex06.emailsrvr.com _sip _tls 5061  

mex08.emailsrvr.com

TypeHostnameDestinationTime to live (TTL)
CNAME autodiscover.example.com autodiscover.emailsrvr.com Lowest possible
CNAME lyncdiscover.example.com lyncdiscover.mex08.emailsrvr.com Lowest possible
CNAME sip.example.com sip.mex08.emailsrvr.com Lowest possible
TypeHostDestinationServiceProtocolPort 
SRV example.com lync01.mex08.emailsrvr.com _sipfederationtls   _tcp 5061
SRV example.com sip.mex08.emailsrvr.com _sip _tls 5061  

mex09.emailsrvr.com

TypeHostnameDestinationTime to live (TTL)
CNAME autodiscover.example.com autodiscover.emailsrvr.com Lowest possible
CNAME lyncdiscover.example.com lyncdiscover.mex09.emailsrvr.com Lowest possible
CNAME sip.example.com sip.mex09.emailsrvr.com Lowest possible
TypeHostDestinationServiceProtocolPort 
SRV example.com lync01.mex09.emailsrvr.com _sipfederationtls  _tcp 5061  
SRV example.com sip.mex09.emailsrvr.com _sip _tls 5061  
sipdir.online.lync.com
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