Synchronize Additional Folders while using BlackBerry Enterprise Services
To synchronize additional folders while using the BlackBerry Enterprise Services (BES), perform the following steps:
In Messages: Click Menu, select Options -> Email Settings, click Menu, select Folder Redirection.
Then select the folders you want to synchronize. (Only new messages will appear. To get the older messages, use Outlook or Outlook Web Access to move them out and then back into the appropriate folder.)