SSL seems not to work in subdomain


I follwed this article to setup letencrypt ssl on an azure app service (production env.) all went well is working great!!

Then i created a sub domain which points to a different app service (demo env.) and tried to use the same ssl, the strange thing is that when trying to access it i get the error

I can’t figure it out what is the reason for this to happen, can anyone please help me?

Thank you

When you got the certificate, did you add that subdomain too? Although you should get a different error when the browser is missing the actual FQDN in the certificate, it most certainly has to be the case of course.

The ERR_CERT_AUTHORITY_INVALID error can be caused because the Intermediate certificate is missing. I've read the article you referred to, but I can't seem to find out how or if the "Azure Let's Encrypt (x86)" manages that intermediate certificate. If you're willing to actually mention the real hostnames you're having trouble with, we can take a look.

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