I have a user who accesses a website on an IIS 6 box on a network local to them (different subnet, same domain). They used Pass-through authentication successfully for several months with the site manually added to the "Local Intranet" zone in IE properties. The user changed their password and can no longer access the site without being prompted for user/pass. Nothing else has changed except this user's password. The OS is Vista using IE 7. Can anyone tell me how to straighten this out?