Unable to add a custom domain

Oleg Skopin 0

I am trying to use the "By App Service Domain" feature in my Web App Service. The domain name is free but I am getting the following error during validation process:

{"code":"InvalidTemplateDeployment","details":[{"code":"ValidationForResourceFailed","message":"Validation failed for a resource. Check 'Error.Details[0]' for more information.","details":[{"code":"SubscriptionExceededMaxDomainLimit","message":"Subscription has reached the limit for the number of App Service domain resources that can be created."}]}],"message":"The template deployment 'Microsoft.Web-AppServiceDomains-Portal-8f2935b4-b807' is not valid according to the validation procedure. The tracking id is '59591954-b64f-4972-8aa7-4552b269fbfe'. See inner errors for details."}

What is that limit and how do I bypass it?

Best regards,

Oleg

Harshitha Veeramalla 1 Reputation point Microsoft Vendor

2025-01-30T09:24:21.1666667+00:00

Oleg Skopin Just checking in to see if the provided answer helped. If this answers your query, do click "Accept the answer” for the same, which might be beneficial to other community members reading this thread. And, if you have any further queries do let us know.

1 answer

Manu Philip 19,271 Reputation points MVP

2025-01-20T19:44:46.9833333+00:00

Hi Oleg Skopin

Please note that there is an app service limit that you should check corresponding to your app service plan as indicated in below reference

App Service limits

Custom domains per app for all plans are 500 except for free subscription. Make sure that your total consumption is maintained

Hope this helps.

--please don't forget to upvote and Accept as answer if the reply is helpful--
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Oleg Skopin 0 Reputation points

2025-01-20T21:24:32.53+00:00

Thanks for your answer Manu.

My app service is under the Founders Hub sponsored subscription. Does this count as "free"?

Oleg Skopin 0 Reputation points

2025-01-20T21:28:00.2966667+00:00

I did have another subdomain added before, but I've purchased it from another provider directly and just added it under the service.

In this case I was trying to purchase it directly via Azure resources, and this failed. I even removed that connected domain to see if this helps, but I've got same error.

I presume it's not about that limit (even though the error says so), but rather about the type of subscription.

Could that be the case?

Manu Philip 19,271 Reputation points MVP

2025-01-21T10:24:47.66+00:00

As per the App Service Limits, no custom domains are allowed to be created. So, it's by the type of subscription
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