Custom Domain is failing to validate

Question

Custom Domain is failing to validate

Toby Beevers 40

Hi Team,

I have been trying to set up a custom domain for node9.co.uk, I have:

Set this up in Entra as a Custom Domain
Added the TXT record to my provider
Checked that the TXT record is resolving (it is)
Asked my domain provider (Fasthosts)

Still not authenticating, the DNS has been in place for over a week now. My ultimate goal to to have a directory for node9.co.uk as I want to be able to have SharePoint in the future

Raja Pothuraju 23,465 Reputation points Microsoft External Staff Moderator

2025-06-17T15:49:43.7566667+00:00
Hello Toby Beevers,

Based on your description, it seems that you are unable to verify your custom domain in your Entra ID tenant, even after correctly adding the TXT records in Fasthosts.

This issue often occurs when the domain has already been verified in another Entra directory, as explained in the following document:

Common verification issues

First, let's check if your custom domain has already been verified in another Entra directory. You can do this by entering your domain name in the following URL to retrieve the tenant ID where it is verified:

https://www.whatismytenantid.com/

Once you have the tenant ID, verify whether it belongs to your tenant. If the tenant ID is different and you do not own that directory, the only option is to contact the Data Protection team via a support ticket to request the removal of the domain verification from the existing Entra ID tenant. After the removal, you should be able to verify the domain in your tenant without any issues.

To involve Data Protection team via a support ticket, I need a few details from you. As this information contains Personally Identifiable Information (PII), please share the following details via private message:

Custom domain Name:

Your tenant ID:

Contact Email address:

Contact Phone Number:

Country

TimeZone

Once you send me these details via private message, we can connect offline to discuss further and assist you in resolving this issue.

Accepted answer

1 additional answer

Your answer

Raja Pothuraju 23,465 Reputation points Microsoft External Staff Moderator

2025-06-17T15:49:43.7566667+00:00

Hello Toby Beevers,

Based on your description, it seems that you are unable to verify your custom domain in your Entra ID tenant, even after correctly adding the TXT records in Fasthosts.

This issue often occurs when the domain has already been verified in another Entra directory, as explained in the following document:

Common verification issues

First, let's check if your custom domain has already been verified in another Entra directory. You can do this by entering your domain name in the following URL to retrieve the tenant ID where it is verified:

https://www.whatismytenantid.com/

Once you have the tenant ID, verify whether it belongs to your tenant. If the tenant ID is different and you do not own that directory, the only option is to contact the Data Protection team via a support ticket to request the removal of the domain verification from the existing Entra ID tenant. After the removal, you should be able to verify the domain in your tenant without any issues.

To involve Data Protection team via a support ticket, I need a few details from you. As this information contains Personally Identifiable Information (PII), please share the following details via private message:

Custom domain Name:

Your tenant ID:

Contact Email address:

Contact Phone Number:

Country

TimeZone

Once you send me these details via private message, we can connect offline to discuss further and assist you in resolving this issue.

Answer 1

Raja Pothuraju 23,465 Microsoft External Staff Moderator

Hello Toby Beevers,

Thank you for sharing the details over private message.

The issue relates to an unable to verify custom domain name as it is verified in different directory in Azure.

To resolve this, we have engaged our Data Protection team through a support ticket. They will reach out to you via email or phone to help restore access to the tenant and assist in resolving the issue.

Once the issue has been resolved by our support team, please feel free to revisit and kindly click "Accept Answer," as this will be helpful to other community members facing similar issues.

Toby Beevers 40 Reputation points

2025-06-17T19:03:51.7966667+00:00

I have not accepted the answer on this as it is not resolved. I have been referred to the Data Protection Team which means that as far as I'm concerned it is not an acceptable answer.

I also find this difficult to understand as I have been able to verify the same domain on www. and dev. in two Static Web Apps on the same Tenant ID which would suggest that the top level can not be verified somewhere else.

I would like to understand how this could have happened with more details
Raja Pothuraju 23,465 Reputation points Microsoft External Staff Moderator

2025-06-18T04:43:38.91+00:00

Hello Toby Beevers,

Let’s connect offline on call to explain it clearly on what’s causing this issue. Let me know your availability.
Raja Pothuraju 23,465 Reputation points Microsoft External Staff Moderator

2025-06-25T19:04:11.9133333+00:00

Hello Toby Beevers,

If all your concerns have been resolved, I would greatly appreciate it if you could mark the answer as "Accepted." This helps both us and others in the community.

Answer 2

Toby Beevers 40

This was resolved by the Data Sec Team as the Domain had previously been associated with another Tenant ID. The only way to get this sorted was to speak with the team on a phone call and then took about 72 hours to get sorted, once done I have been able to verify the domain with the TXT record.

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Custom Domain is failing to validate

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