This is perhaps the weirdest IT problem I have encountered in my 20+ years of IT work.
I have a client whose new network was recently installed about three weeks ago. It has one AD server and eight workstations, all members of the domain. There are three domain admin accounts. These accounts can login to the AD server without any issues.
However, when the same accounts are used to login to a desktop (workstation), the hour glass rolls and rolls as if the system is stuck during the process. This only happens to accounts that are domain administrators.
Regular users can login without any problems. Why is this?