We have a windows 2003 domain. All users have roaming profiles. We have a couple of users who, when they log into outlook, are asked for their password every time, despite selecting the 'remember my password' option. Our email is externally hosted exchange email. I've tried several fixes found on google such as deleting 'protect' folder in the user's profile, and deleting protect key in the registry but none work. I tried storing the password in windows' password/credentials manager, didn't work. It happens on any PC the users log into so it's not a machine specific problem.
Any ideas? OS is Windows XP pro. Outlook is 2007.