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. The domain is currently registered with a third-party registrar. Which DNS record type is primarily used to verify domain ownership during the custom domain setup process in Microsoft 365?
- ASRV record
- BA record
- CMX record
- DTXT record
Show answer & explanationAnswer & explanation
Correct answer: D. TXT record
To prove ownership of a custom domain, Microsoft 365 typically requires adding a specific TXT record to the domain's DNS zone. This record contains a unique verification string that Microsoft 365 checks.
Why the other options are wrong
- A. SRV records are for service location and are configured after verification.
- B. A records map hostnames to IP addresses and are not used for domain ownership verification in this context.
- C. MX records are for mail exchange and are configured after verification.
DNS TXT Record
A type of DNS record that provides text information to sources outside your domain, often used for verification or policy data.
- Used for domain ownership verification (e.g., Microsoft 365, Google).
- Can contain SPF or DKIM records for email authentication.
- Does not directly affect mail flow or website access.
Memory trick: Remember DNS records are like signs on the internet highway, each with a different purpose.