# Which of the following is NOT a valid field in an ACME issuer configuration?

cert-manager, Medium (Advanced), Concepts. https://k8wiz.com/uquiz/which-of-the-following-is-not-a-valid-field-in-an-acme-issuer-configuration

- A. server
- B. email
- C. privateKeySecretRef
- D. certificateAuthority

**Answer:** certificateAuthority

**Explanation:** certificateAuthority is not a valid field in an ACME issuer configuration. The valid fields include server (the URL of the ACME server), email (the email address to register with the ACME server), privateKeySecretRef (reference to a secret containing the ACME account private key), and solvers (configuration for solving ACME challenges).