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How to Verify Microsoft 365 Domain When Site5 Disallows Blank TXT Host
Question details
The user needs to add a DNS TXT record to verify their custom domain for Microsoft 365, but the DNS provider (Site5) does not allow leaving the host name blank or using the standard '@' symbol.
- Product
- Microsoft 365 / Site5
- Device & OS
- not provided
- Scenario
- Verifying a custom domain ownership in the Microsoft 365 admin center by updating DNS records in the Site5 control panel.
- Observed behavior
- Site5's DNS management interface rejects the TXT record creation when the host field is left blank or filled with an '@' symbol, preventing domain verification.
Log into your Microsoft 365 Admin Center to copy your unique MS=msXXXXXXXX verification value, and have your Site5 cPanel credentials ready in a separate tab.
Use Your Full Domain Name in the Host Field
Since Site5 does not accept a blank space or an '@' symbol for the root domain, entering the full domain name explicitly resolves the formatting restriction.
Different DNS hosting providers use varying formats to denote the root domain. While Microsoft recommends using an '@' symbol or leaving the field blank, Site5 requires the actual domain name to accurately map the TXT record to the root.
In the Microsoft 365 admin center, go to Settings > Domains, select your custom domain, and copy the TXT value (formatted like MS=msXXXXXXXX) provided for verification.
Log into your Site5 cPanel. Scroll down to the 'Domains' section and click on the 'Advanced Zone Editor' or 'Zone Editor' icon.
In the 'Name' or 'Host' field of the new record section, type your complete domain name (e.g., yourdomain.com) instead of leaving it blank or using an '@' symbol. Ensure it ends with a period if required by the panel (e.g., yourdomain.com.).
Select 'TXT' from the Type dropdown menu. Paste the Microsoft verification value into the 'TXT Data' or 'Value' field, then click 'Add Record' to save your changes.
Wait a few minutes for the DNS changes to propagate, then return to the Microsoft 365 admin center and click the 'Verify' button to complete the process.
Use an Alternative MX Record for Verification
If TXT record creation continues to fail, Microsoft 365 sometimes allows you to verify domain ownership using an MX record instead.
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Frequently Asked Questions
Why does Microsoft 365 require a TXT record for my domain?
Microsoft requires a TXT record to verify that you are the actual owner of the domain you are trying to add to your organization. It acts as a secure digital fingerprint that only the domain administrator with access to the DNS zone can configure.
What does the '@' symbol mean in DNS settings?
In DNS terminology, the '@' symbol is a shorthand placeholder that represents the root domain (e.g., yourdomain.com). However, older or custom-built control panels like the one used by Site5 sometimes lack support for this shorthand and require you to type the full domain name explicitly.
How long does it take for Microsoft 365 to verify my new TXT record?
DNS propagation is usually fast for TXT records, often completing within 10 to 15 minutes. However, depending on your registrar's TTL (Time To Live) settings and global network caching, it can occasionally take up to 24-48 hours. If verification fails immediately, wait a few minutes and try clicking 'Verify' again.
Can I delete the verification TXT record after Microsoft 365 confirms my domain?
Yes. Once Microsoft 365 has successfully verified your domain ownership and your service is fully active, the specific 'MS=msXXXXXXXX' TXT record is no longer needed and can be safely deleted from your Site5 DNS settings.
