Outlook XP, 2002, & 2003 (Windows)
Click the "Tools" menu. Click the "E-Mail Accounts" option. (Show me)
Choose the "View or Change an Existing Account" option, click "Next". Choose your account in the white box and then click the "Change." button. (Show me)
Enter your new password in the "Password" field.
Be sure that the "User Name" is the first part of your e-mail address, everything before the "@" (Show me)
Click "Next", then "Finish".