Requesting a certificate fails with the error message "A certification chain processed correctly, but one of the CA certificates is not trusted by the policy provider. 0x800b0112 (-2146762478 CERT_E_UNTRUSTEDCA)"

Here's the scenario:

  • A user requests a certificate from an Active Directory integrated certification authority (enterprise CA).
  • The certificate of the certification authority is trusted, i.e. it is located in the Trusted Root Certification Authorities store.
  • The certificate request fails with the following error message:
A certification chain processed correctly, but one of the CA certificates is not trusted by the policy provider. 0x800b0112 (-2146762478 CERT_E_UNTRUSTEDCA)

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