Microsoft 365 Certified: Administrator ExpertDeploy and manage a Microsoft 365 tenantEasy
A Microsoft 365 administrator needs to assign a custom domain, 'contoso.com', to their tenant. After adding the domain in the Microsoft 365 admin center, the system prompts the administrator to add a specific DNS record to verify ownership. Which type of DNS record is typically used for domain ownership verification during the initial setup of a custom domain in Microsoft 365?
- AA record
- BTXT record
- CSRV record
- DMX record
Show answer & explanationAnswer & explanation
Correct answer: B. TXT record
Microsoft 365 uses a TXT record for domain ownership verification. This record, which contains a unique string provided by Microsoft, needs to be added to the domain's DNS zone to prove that you own the domain before it can be fully configured in Microsoft 365.
Why the other options are wrong
- A. A records map hostnames to IP addresses, not for domain ownership verification.
- C. SRV records are service records used for locating services like SIP or XMPP, not for domain verification.
- D. MX records are for email routing, not domain ownership verification.
DNS TXT Record for Domain Verification
A type of DNS record containing text information, used by services like Microsoft 365 to verify ownership of a domain by requiring the domain owner to publish a specific string.
- Contains a unique string provided by Microsoft 365.
- Must be added to the domain's public DNS zone.
- Temporary for verification, though often left in place.
Memory trick: TXT is like signing your name to prove you own the domain.