The wireless data synchronization feature is designed to synchronize organizer data (contacts, calendar entries, tasks, and memos) between your BlackBerry® device and the email application on your computer, over the wireless network.
The wireless email reconciliation feature is designed to reconcile email messages between your device and the email application on your computer over the wireless network. When you file or delete email messages on your device, these email messages should be filed or deleted in your email application. Likewise, any changes that you make to email messages in the email application on your computer should be reflected on your device.
In rare cases, if your device does not recognize fields in a contact, calendar entry, or email account, some data or email messages cannot be synchronized or reconciled.
If wireless data synchronization or wireless email reconciliation is not available on your device or you have turned off these features, you can use the synchronization tool of the BlackBerry® Desktop Manager to synchronize your organizer data and email messages. For more information, see the Help in the BlackBerry Desktop Manager.
Research In Motion recommends that you regularly create and save a backup file on your computer, especially before you update any software. Maintaining a current backup file on your computer might allow you to recover device data if your device is lost, stolen, or corrupted by an unforeseen issue.