Hello,

My Azure website works if people google search XXXXXXXX.org

however if they put in www.XXXXXXX it give this error.

Your connection is not private

Attackers might be trying to steal your information from www.bXXXXXX.org (for example, passwords, messages, or credit cards). Learn more about this warning

net::ERR_CERT_COMMON_NAME_INVALID

This is a new problem and wondering if there is a setting or something which I can do to fix this problem.

Thank you,

~ Glen Kyle

Bridges to New Life Society

edited PII info

HI @Director

Just following up to see if your issue has been resolved or if you had a chance to review my earlier comment?

I might be wrong, but that ERR’s just www missing from the tls chain, so add www.yourdomain.org and bind the cert only after the CNAME fully settles. If it still feels off, peek the redirect once—Azure keeps old paths cached and it bites ppl right after this fix.　

HI @Director

Thanks for reaching us regarding your issue from the deep investigation we found that The issue is due to an SSL certificate hostname mismatch. The root domain loads securely because it has a valid certificate bound, but the www hostname is not included in the certificate, which results in the ERR_CERT_COMMON_NAME_INVALID browser warning. DNS resolution is correct; the missing SSL binding for the www hostname is the cause.

To resolve this, add www.<domain> as a custom domain in Azure App Service and bind an SSL certificate (App Service Managed Certificate is recommended and free on Basic+ plans). Once the www hostname shows as secured, the warning will be resolved.

Quick steps:

• Azure portal > App Service > Custom domains > verify the www hostname is listed (add it using + Add custom domain if missing, using the existing CNAME).
• Next to the www hostname > Add binding > Source: App Service Managed Certificate > Validate (add the TXT record shown by Azure to DNS).
• Select Add >status changes to Secured after validation completes.

Reference :

https://learn.microsoft.com/en-us/azure/app-service/configure-ssl-bindings
https://learn.microsoft.com/en-us/azure/app-service/app-service-web-tutorial-custom-domain?tabs=root%2Cazurecli

If the answer is helpful,  Please do click "Accept the answer” and Yes, this can be beneficial to other community members.

If you have any other questions, let me know in the "comments" and I would be happy to help you

 

HI @Director

I’m glad to hear your positive response and appreciate you sharing the update in private chat.

Just checking in to see if the earlier answer helped resolve your query. If it did, please click “Accept the answer” and consider upvoting it—this can be helpful for other community members who might face a similar issue.

If you have any further questions or need additional assistance, please feel free to let us know. We’re here to help!