Outlook Express is an email server used to remotely access other email accounts (e.g work email) conveniently from the comfort of your home. It allows you to configure a variety of email accounts all of which have separate passwords used to access the email account that's been set up. Changing these Outlook Express account passwords is a luxury you can perform anytime you want to and as many times as you want.
Launch Outlook Express and click the "Tools" button on the main menu. Scroll down and click "Accounts."
Double-click the account you want to adjust and click the "Servers" tab. Delete the current password in the password box and enter a new password. Click "Remember password" if you want.
Click "Apply" to save the changes and "OK" to close the settings window.