Testing Approaches To Prove or Disprove - "SSL Certificate is not trusted" message

Hi @edgeglobal

There have been some great suggestions.

When testing it’s important to understand the context of the test and why it might be wrong.

A) I suggest using an Online Scanner like SSLLAbs.com
B) You can also use OpenSSL to confirm

There are usually two main reasons why a test might be failing

Root Related Issues
Intermediates

I wrote a quick guide on how to use OpenSSL. Using OpenSSL with Mozilla Root CA Bundle to Avoid unable to get local issuer certificate Errors

You definitely want to use tools like SSLLabs or OpenSSL to double check your findings as it could be a browsers or OS issue.

Andrei