Error message when I use Kerberos authentication

[User46538518]

Hi, when I tried to use Kerberos to authenticate user, it failed and the error logs as attached, please help to check and let me know if you need further logs to investigate. Envrionment: MWG join Domain A, MWG THD setting by using Domain A. But the user and the client is not join Domain A (network limitation on the customer side), so the browser will pop-up user logon window and we type the user information of Domain A, and we saw the error message.

[fw_mon]

Hello @User46538518 

you forgot to add an attachment(s).