Azure Front Door Standard/Premium blocks custom domain due to orphaned global hostname ownership (no support plan)

Thomas Deutsch 25 Reputation points
2026-01-09T06:10:41.8833333+00:00

I am blocked adding a custom domain to Azure Front Door Standard/Premium and need an internal escalation.

Issue When creating a custom domain in Azure Front Door, I receive:

“Another custom domain with the same host name already exists.”

This happens immediately, before DNS validation.

Affected hostnames

demo.bluectrl.app

bluectrl.app (apex domain)

Subscription

Resource Group: xxxxx

Front Door Profile: xxxxx

SKU: Azure Front Door Standard

Facts

The domain was recently purchased (new owner)

DNS is currently clean and delegated to the registrar

No Azure Front Door profile in my subscription uses these hostnames

az afd custom-domain list confirms the hostnames do not exist in this profile

DNS queries show no CNAME or A records pointing to Azure Front Door

The error persists across retries and after full DNS reset

Conclusion

This appears to be an orphaned global hostname ownership record in Azure Front Door (leftover from a previous tenant/subscription).

This is a known backend condition that cannot be resolved by customers and requires cleanup by the Azure Front Door engineering team.

Request

As I do not have a technical support plan, I kindly ask a Microsoft moderator to:

Escalate this internally to the Azure Front Door product/engineering team

Request removal of the orphaned global hostname ownership for:

demxxxapp

bxxxl.app

Thank you for your assistance.

Azure Front Door
Azure Front Door

An Azure service that provides a cloud content delivery network with threat protection.

Answer accepted by question author
Vallepu Venkateswarlu 10,595 Reputation points Microsoft External Staff Moderator
2026-01-09T14:09:52.6666667+00:00

Hi @ Thomas Deutsch,

Welcome to Microsoft Q&A Platform

As discussed offline, the Backend Team has cleared the orphaned global hostname ownership record in Azure Front Door. I can confirm that both domains are now accessible and functioning without any issues.

Please210246-screenshot-2021-12-10-121802.pngand “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

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