Push Technology involves having a persistent Internet connection on your portable device. The email server then finds the device and sends or "pushes" the email to the device as soon as it arrives on the Exchange server.

If you're using a Windows Mobile phone or a Blackberry, you are already able to "push" Exchange e-mails, calendars and contacts to your device in real time.

For more information, see the complete list of wireless features included with Exchange 2007.