Originally Posted by bisleri
To enable Automatic Wireless Backup on BlackBerry Enterprise Server 5.0, complete the following steps:
In the BlackBerry Administration Service, select Users > Manage Users.
On the Manage Users tab, click a BlackBerry smartphone user account.
Click Default Configuration under Messaging configuration.
Click Organizer data synchronization.
Click Edit User.
In the drop-down list for Automatic Wireless Backup Enabled, click True.
Click Continue to user information edit.
Click Save all.
After that activate user again.
Automatic Wireless Backup is enabled by default on our BES when setting up/activating users