Office 365 DNS records

O365DNSrecords.zone

; Exchange Online
@ 3600 IN MX 0 <domain selector>.mail.protection.outlook.com.
autodiscover 3600 IN CNAME autodiscover.outlook.com.
@ 3600 IN TXT "v=spf1 include:spf.protection.outlook.com -all"

; Skype for Business
sip 3600 IN CNAME sipdir.online.lync.com.
lyncdiscover 3600 IN CNAME webdir.online.lync.com.
_sip._tls.<domain name>. 3600 IN SRV 100 1 443 sipdir.online.lync.com.
_sipfederationtls._tcp.<domain name>. 3600 IN SRV 100 1 5061 sipfed.online.lync.com.

; Mobile device management
enterpriseregistration 3600 IN CNAME enterpriseregistration.windows.net.
enterpriseenrollment 3600 IN CNAME enterpriseenrollment.manage.microsoft.com.

; DKIM settings (optional)
selector1._domainkey 3600 IN CNAME selector1-<domain selector>._domainkey.<tenant name>.onmicrosoft.com.
selector2._domainkey 3600 IN CNAME selector2-<domain selector>._domainkey.<tenant name>.onmicrosoft.com.

; DMARC settings (optional)
_dmarc IN TXT "v=DMARC1; p=quarantine; rua=mailto:<dmarc mailto adres>; ruf=mailto:<dmarc mailto adres>; pct=25; sp=none; fo=1;"