A user can change their own password by using OWA (Outlook Web Access) and logging in as themselves.

Exchange 2007
Using https://portal.elephantoutlook.com

  1. Login with your primary email address / password.
  2. Select Options > Change Password
  3. Enter and confirm the new password.
  4. Click Save button.

Exchange 2010
Using https://portal.us.elephantoutlook.com

  1. Login with your primary email address / password.
  2. Select Options > Change Password
  3. Enter and confirm the new password.
  4. Click Save button.