← cd ~/tools
// tools/m365-dns
Microsoft 365 DNS checker
Enter a domain to check the records Microsoft 365 needs for Exchange Online, Teams, Intune enrolment and Entra device registration. Each one shows what was found, what Microsoft expects and whether it's required.
Lookups go straight from your browser to a public DNS resolver. Nothing is sent to this site.
Based on Microsoft's external DNS records for Microsoft 365. For SPF, DKIM and DMARC detail, use the email security checker.