Static Web App custom domain orphaned after failed add - every re-add fails with unknown error

Question

Static Web App custom domain orphaned after failed add - every re-add fails with unknown error

Steven Leitner 0

Custom domain legal.greaterbergen.org cannot be added to any Static Web App. Every attempt fails with "An unknown error has occurred while adding your custom domain. Please try again later," and the failed record then hangs in Deleting for hours.

History: the first add (Aug 11, roughly 19:40 to 19:56 UTC, East US 2) crashed mid-operation. Its customDomains child resource hung in Deleting, and the parent app was deleted while the child was still Deleting. Since then, every re-add of this hostname on freshly created apps fails identically. The hostname appears to be orphaned in the regional backend.

Ruled out client-side: DNS verified on the authoritative name servers before every attempt (both CNAME and TXT). Both cname-delegation and dns-txt-token validation methods were tried. CAA records permit digicert.com. Two different fresh apps were tested. Sibling subdomains on the same zone (hsrp.greaterbergen.org and unityday.greaterbergen.org) work fine with identical configuration.

Current resource: subscription 3b2fff42-d8bc-4391-b78b-a1c5d315a6ec, resource group gbca-web-rg, Static Web App gbca-legal2 (default hostname gray-smoke-0c705c70f.7.azurestaticapps.net), East US 2.

Request: please locate and release the orphaned hostname registration for legal.greaterbergen.org so it can be added to gbca-legal2. Evidence trail: github.com/Azure/static-web-apps/issues/1796

Praneeth Maddali 12,670 Reputation points Microsoft External Staff Moderator

2026-08-12T17:02:47.6666667+00:00

Hi @Steven Leitner

Thank you for contacting Microsoft Support regarding the issue where the custom domain is stuck in the "Deleting" state.

We have started investigating the issue and are currently reviewing the configuration and backend status. We will keep you updated on our findings and share any recommendations or next steps as soon as possible.

If you have any additional details that may help with the investigation, please feel free to share them with us.

We appreciate your patience and understanding while we work on resolving this issue.

1 answer

Your answer

Praneeth Maddali 12,670 Reputation points Microsoft External Staff Moderator

2026-08-12T17:02:47.6666667+00:00

Hi @Steven Leitner

Thank you for contacting Microsoft Support regarding the issue where the custom domain is stuck in the "Deleting" state.

We have started investigating the issue and are currently reviewing the configuration and backend status. We will keep you updated on our findings and share any recommendations or next steps as soon as possible.

If you have any additional details that may help with the investigation, please feel free to share them with us.

We appreciate your patience and understanding while we work on resolving this issue.

Answer 1

Hi @Steven Leitner

Thank you for your patience while we looked into this.

We have received confirmation that mitigation has been applied, and your custom domain issue should now be resolved. Could you please retry the operation and verify whether everything is working as expected?

If you are still experiencing any issues, please reply with an update and any relevant details. We will be happy to continue assisting you and investigate further if needed.

We look forward to hearing back from you.

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