Problem: when user trying login to their domain account. It can not recognize the relationship. A message shows “Trust relationship between this computer and the primary domain has been failed”

Solved: login as local admin .\admin. removed from the domain. It may ask you to use your domain admin account. Please use it and restart your PC.Laptop.

Then log in as local admin again. Add the PC/Laptop back again in the domain. used domain admin account to approve.

Then restart again.

Then log in as a domain ./user account.

It should work.