Question : After successfully changing password, Outlook prompts to change password again.

I have a user that successfully changed their domain password after receiving an expired password prompt.  They did not log out to change the password.  After a few minutes Outlook 2003 prompts them to reset the domain password again.  What would cause this and how do I solve the issue?

Answer : After successfully changing password, Outlook prompts to change password again.

Simple.
Restart the computer.

Outlooks looks to windows for the log in info. This happens to some of my users who never like to close outlook or even restart after changing a password.