Properties on the details tab of a certificate in the Certificates MMC in Windows shows with a warning yellow triangle and exclamation mark (exclamation point)

You might be wondering why some properties on the details tab of a certificate in the Certificates MMC in Windows shows with a warning yellow triangle and exclamation mark (exclamation point).#


This simply indicates whether the extension is marked as "Critical".

The critical setting can be seen in .NET on the constructor of the extension

https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509extension.-ctor






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