Microsoft Office365 DNS Check

Use this page to check for and verify all relevant DNS records are in place for Office365 services.

This tool will check for Office365 CNAME records as well as valid SPF and Office365 SRV records.

Please Note: Where possible this tool will follow the same logic as the 'verify DNS records' process within the Office365 portal.
All Microsoft Office365 records require a TTL of 3600 (1 Hour), however the check does not fail if the TTL differs to this as long as the record values are correct.