In this post, you’ll learn more about the Error TPM_20_E_AUTH_UNAVAILABLE – 0x8028012F that is returned when working with the COM-based APIs in Win32
Win32 COM Error
TPM_20_E_AUTH_UNAVAILABLE – 0x8028012F
Win32 COM Error Error Description
TPM 2.0: authValue or authPolicy is not available for selected entity.