How to Verify a Custom Domain in Microsoft 365
Select the answer that correctly completes the sentence.
When you need to add a domain to a Microsoft 365 subscription, you must verify the domain by adding a public DNS record. .
Explanation
Before Microsoft 365 can use a custom domain for services like Exchange Online, SharePoint, or sign-ins, you have to prove you own it. Microsoft's standard method for that is adding a DNS record — usually a TXT record — at your domain registrar or DNS host. None of the other options (business address, certificate, or webpage upload) are part of Microsoft's actual domain verification process.