Remotely wiping your Exchange mail data from mobile device:
If you have lost your mobile device or it has been stolen then it can be a huge security risk for your data and the information on the mobile device. You can issue a remote wipe command in Outlook Web Access. This option erases all data on the mobile device related to your exchange 2007 account.
To wipe all data from a device
1. Select the mobile device that you want to wipe.
2. Click Wipe All Data from Device.
3. Click Yes when you are prompted to confirm that you want to wipe all data from the device.
4. Please remove the device from the list.
If you recover the device, you can add it back by initiating synchronization from the device.