We have a SP2016 on-premise. It is installed on domain
sharepoint.local. One-way trust is established to our company domain
company.com. It works fine for last 1 year.
Recently we have rollback the VM snapshot to a week earlier for some troubleshooting. After we rolled back, every user of
company.com cannot login. The login prompt is prompting forever until user press "cancel" and returned 401 UNAUTHORIZED page.
But all users of
sharepoint.local can login without problem.
I never encountered this issue and not sure how to start our troubleshooting. Could you please advise?
P.S. before rollback we are performing some hardening procedure but no password prompt at that moment