I've got a number of users in our network that can't get any response from the "Change Password" button when pressing Ctrl-Alt-Del. They click on the "change Password" button and nothing happens. I ran a trace and found it was getting a "-669 Password Authentication error", yet everyone can login OK. All workstations are domain joined but not using domain accounts, does this make a difference? Also this used to work, we've only recently discovered it doesn't. Any idea's anyone?