Hello,
Thank you so much for posting here.
A cross-certificate is a digital certificate issued by one Certificate Authority (CA) that is used to sign the public key for the root certificate of another Certificate Authority. Cross-certificates provide a means to create a chain of trust from a single, trusted, root CA to multiple other CAs.
I have checked that there are also some cross certificates in my environment.
For more information, we could refer to:
https://learn.microsoft.com/en-us/windows/win32/seccertenroll/about-cross-certification
Best regards,
Hannah Xiong
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