Unable to add A record to Static Web App (previously supported for same project/domain)

[MalekBouba]

Describe the bug

When trying to add an A record to my Azure Static Web App custom domain settings, the portal doesn't generate the IP to copy and shows the following error:

“A records aren't supported on this Static Web App resource. Try a different record type.”

This same A record (for the same domain and project) had been added successfully before and was working fine. Now it’s suddenly rejected, even though nothing has changed in the project or domain setup.

To Reproduce
Steps to reproduce the behavior:

1. Go to the Azure Portal → Static Web App → Custom domains
2. Click Add
3. Select A as the hostname record type
4. The form doesn't accept it, and doesn't show IP to copy,
5. See the error message:
   “A records aren't supported on this Static Web App resource. Try a different record type.”

Expected behavior

The Static Web App should allow adding an A record for the apex domain, just like before. The configuration was previously supported and working for this same project and domain.

Screenshots

Device info (if applicable):

• OS: macOS
• Browser: Safari
• Version: 18.6

Additional context

• The same domain (apex) was already verified and functional before.
• I removed and tried to re-add it, but it now fails.
• The www subdomain (via CNAME) still works fine.
• The domain record TXT still works fine.
• The issue started around Oct 30, 2025.
• DNS provider: OVHCloud

[MalekBouba]

A week passed, and I'm still experiencing the same problem, and I noticed that OVHCloud’s Domain management services (registration, renew, transfer, etc.) are showing warnings and degraded status on their status page.

Could this issue be related to the current OVHCloud DNS/domain management outage?

[ellinge]

We have this issue as well, previously worked fine but now says unsupported. Not sure exactly when it occurred though. Changed DNS-provider recently, have tried with readding the domains and updating the TXT-records with new values but still says:

A records aren't supported on this Static Web App resource. Try a different record type.

No changes here https://learn.microsoft.com/sv-se/azure/static-web-apps/apex-domain-external#set-up-an-a-record

[ellinge]

A test using the hosts file (C:\Windows\System32\drivers\etc\hosts) confirms that it still works. This is a backup/disaster site, so we only apply temporary changes to the main sites’ A records.
I used the IP from stableInboundIP (found in the JSON view of the static web app). It matches the one previously shown when the dialog was functioning, so my guess is that this was/is just a temporary glitch.