Users who have a local login are able to change their password using this form. Passwords are stored in an encrypted form (MD5 hash) and cannot be recovered; however, Admin users are able reset the password using the Edit Users form.
Users that are managed through an external authentication method (e.g. a university central sign-on system using RADIUS or LDAP) cannot change their passwords on these systems through Bumblebee and do not see this menu entry.