Error adding www subdomain to Static Web App

Question

Error adding www subdomain to Static Web App

MK 0

I have an Azure Static Web App that is functioning fine on one domain that is registered with GoDaddy. The DNS zones are managed in Azure.

We need to add a different domain name as well. This one is registered with AWS (Route 53 domain service). We do not manage the AWS domain. However, the owners have changed the DNS servers to point to the Azure DNS zone we set up for it. This has been verified with NS lookups.

However, when we try to Add custom domain on Azure DNS and enter www./domainname/.tld (real name redacted), we get the following error:

"Failed to add custom domain to SWA with error message: CNAME Record is invalid. Please ensure the CNAME record has been created."

Considering that this process worked fine for the GoDaddy registered domain, is there a problem with this process for AWS registered domains? Or another step we are missing in this case?

Thank you

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Answer 1

Grmacjon-MSFT 19,301 Moderator

Hi MK, based on this Github thread it seems like this is a known scenario. Below is the workaround that was suggested:

"So we believe the problem is caused by the presence of CAA records in your custom domain's parent domain, which prevents the SWA platform from provisioning a certificate. For example, if you are trying to add yoursite.mydomain.com to the SWA and you have incompatible CAA records at mydomain.com (the parent domain), we will be unable to issue a certificate and the overall custom domain add process will fail.

You can either

remove these CAA records, or
add a new CAA record to enable our certificate provider, DigiCert, to issue certificates for your domain. this would be of the form mydomain.com CAA 0 issue "digicert.com"

After the record changes propagate, you should be able to try again. "

Hope that helps. Please let us know if you have further questions

Thanks,

Grace

--If the reply is helpful, please Upvote and Accept as answer--

MK 0 Reputation points

2023-01-17T17:56:12.52+00:00

Thank you for the quick help!

We have added the CAA record. Unfortunately, we are still receiving the same error. Is there anything else we can try?

Just to be sure our entry is accurate, here is how the CAA record appears when doing a dns lookup on our domain (note that ourdomain.org is replaced with our real domain of course):

ourdomain.org. 300 IN CAA 0 issue "digicert.com"
Grmacjon-MSFT 19,301 Reputation points Moderator

2023-01-17T18:19:06.69+00:00

thanks for the update MK. we are sharing this error/ potential bug internally with the engineering team and will get back to you when we hear back from them. we appreciate your patience.
Grmacjon-MSFT 19,301 Reputation points Moderator

2023-01-17T22:53:41.97+00:00
MK can you provide the below infomation via email?

The domain you are trying to add

The static web app you are trying to add to (either Azure resource id or default generated hostname)

How you are adding the domain (is it in portal, Azure CLI, etc.)?

you can email me at [azcommunity@microsoft.com] with the subject ATTN: Grace and in the body of the email, include your Azure subscription ID and a link to this thread

We look forward to hearing from you.

Thanks,
Grace

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Error adding www subdomain to Static Web App

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