In this post, you’ll learn more about the Error SEC_E_UNSUPPORTED_PREAUTH – 0x80090343 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
SEC_E_UNSUPPORTED_PREAUTH – 0x80090343
Win32 COM Error Error Description
An unsupported preauthentication mechanism was presented to the Kerberos package.