Updates to the email2 Toolbar are driven directly from the Private Email NetworkPEN - PEN administrators decide independently when it is time to update the Toolbar and the process occurs automatically (though a self-update check performed on the initial load of Outlook).
Unlike many other solutions (anti-virus, spam control, encryption), email2 can be deployed slowly, in a workgroup-by-workgroup fashion. This is because email2 is backward compatible and need only be installed by those who wish to use it. If the Toolbar installation is a problem, users are still able to access email2 messages via the email2 Web Client (built in an attractive, intuitive AJAX / Web 2.0 fashion). The email2 Web Client reproduces all of the functionality of Outlook, but specifically for email2 Messages.
// Edited July 2008