IIS server delivers an old, expired SSL Certificate, giving ERR_CERT_AUTHORITY_INVALID

  • Thread starter Thread starter RanAground
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RanAground

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I enabled IIS on one of my machines (Win 10), made a tiny website, bought an SSL Cert (SECTIGO, not self-signed), installed it. All went OK. When I test the website in IIS or from any other machine or browser, it gives this error: ERR_CERT_AUTHORITY_INVALID. If I click the error, it shows that the SSL certificate for the website is not the one I bought and installed, but an old one that expired over 2 years ago. I don't know where it's coming from, and it's not one I ever added or bought.The website is in the ddnsfree.com domain from dynu.com, the certificate was purchased from dynu.com for th

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