Users with BlackBerry devices that are running BlackBerry® Device Software version 4.5 or later can download attachments in any native format to their BlackBerry devices. Users can open and make changes to native file formats using an appropriate third-party application on their BlackBerry devices. Users might be able to open specific file formats using the media application on their BlackBerry devices.

To manage network resources in your organization's environment, you can change the maximum file size of attachments that users can download to their BlackBerry devices.

• Change the maximum file size for attachments that users can send
  
• Prevent users from sending large attachments
  
• Change the maximum file size of attachments that users can download