Outlook cannot find cacert.org certficate

Chris Jacobs 1 Reputation point
2021-07-25T20:25:53.17+00:00

The certificate is there, outlook can sign with it. But when I receive encrypted mail same certificate is not found.
The error appears in Outlook but not in Thunderbird.
The error appears with cacert.org certificate but not with Actalis or Sectigo certificate.
A difference I see between cacert.org certificate and Actalis or Sectigo certificate I see is that my cacert.org certificates hang directly under the root certificate, no intermediate.
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Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Jade Liang-MSFT 9,981 Reputation points Microsoft Employee
    2021-07-26T05:58:45.497+00:00

    Hi @Chris Jacobs ,

    As I know, this error may occur when you haven't configured the certificate successfully or not chosen the correct certificate in Outlook. So it's recommended to first check if you have chosen the correct certificate(File>Options>Trust center>Trust center settings>Email security )
    117816-snipaste-2021-07-26-14-00-47.png

    If you have checked that, due to I could work with my certificate in Outlook and couldn't test on same certificate with yours, I have researched a lot about it and found a similar thread that some users said that solution could work for them, please kindly check if it could also be helpful to you, for your reference: Your Digital Id Name Cannot Be Found By The Underlying Security

    If your issue has any update, please feel free to post back.


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