DNS Records Required for Office 365

The following is a list of external DNS records required for Office 365 services. NOTE: Not all DNS records apply to every subscription.

Office 365 Core Services
CNAME:
  • Host Name: msoid
  • Target: clientconfig.microsoftonline-p.net
TXT:
  • Host Name: @
  • TXT Value: Provided by Office 365

 

Exchange Online
MX:
  • Host: @
  • Target: <domain>.mail.protection.outlook.com
  • Priority: 0
CNAME:
  • Alias: autodiscover
  • Target: autodiscover.outlook.com
SPF (TXT):

 

Skype for Business Online
SRV:
  • Service: _sipfederationtls
  • Protocol: _TCP
  • Priority: 100
  • Weight: 1
  • Port: 5061
  • Target: sipfed.online.lync.com
  • Service: _sip
  • Protocol: _TLS
  • Priority: 100
  • Weight: 1
  • Port: 443
  • Target: sipdir.online.lync.com
CNAME:
  • Alias: sip
  • Target: sipdir.online.lync.com
  • Alias: lyncdiscover
  • Target: webdir.online.lync.com

 

Mobile Device Management
CNAME:
  • Alias: enterpriseenrollment
  • Target: enterpriseenrollment.manage.microsoft.com
  • Alias: enterpriseregistration
  • Target: enterpriseregistration.windows.net

 

Reference(s):
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