The IIS website is not secure on Edge Browser but the same site is secure on Internet Explorer.

Question

My environment has AD DC, AD CS, and IIS Web SERVER. my domain is testbed.local and I make two websites on IIS web as demo1.testbed.local and demo2.testbed.local then make a wildcard certificate as *.testbed.local and bind it to both sites.
https://demo1.testbed.local/ and https://demo2.testbed.local/ working well on Internet Explorer 11 but Edge browser shone the below error for the same sites.

NET::ERR_CERT_COMMON_NAME_INVALID
This server couldn't prove that it's demo1.testbed.local; its security certificate does not specify Subject Alternative Names. This may be caused by a misconfiguration or an attacker intercepting your connection.

Watch the video to take an idea about my problem https://youtu.be/Y-TjaD004tg

I hope all your support will help solve this issue.

Answer 1

Hi @Dilusha Priyantha Karunarathna ,
This problem is usually caused by a lack of SAN information, and Edge versions higher than v79 require the SAN information to be included in the certificate. If the certificate does not have the correct SubjectAlternativeName extension, it will trigger an error that the security certificate does not specify a Subject Alternative Name. You can regenerate the certificate to include the subject alternative name，then replace the problematic certificate with this one that contains the extension. In addition, you can also disable the checking of SubjectAlternativeName in your browser configuration.

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Best regards,
Yurong Dai

Answer 2

Hi all,

Error correction video link https://youtu.be/ho29GNTi_4I