In this post, you’ll learn more about the Error CRYPT_E_NO_TRUSTED_SIGNER – 0x8009202B that is returned when working with the COM-based APIs in Win32
Win32 COM Error
CRYPT_E_NO_TRUSTED_SIGNER – 0x8009202B
Win32 COM Error Error Description
None of the signers of the cryptographic message or certificate trust list is trusted.