Hi Kenny, Do you mean you are trying to verify a custom domain to Office 365 by adding a TXT or an MX record? Here is an article for your reference: Verify your domain and change name servers at any domain registrar . Note: If any changes occur to any DNS record, wait up to 72 hours for the changes to propagate before you try to verify the domain again. To further identify the root cause of the issue, please refer to Troubleshoot domain verification issues in Office 365 . In addition, since different DNS hosting providers have different rules to add DNS records, if you have any problems with adding DNS records, we recommend you contact your DNS hosting provider. If anything is unclear, please let us know. We're always here for you. Thanks, Alice
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