Blackberry PRD-10459-003 Administration Guide - Page 313

Administration Guide Changing how the BlackBerry Messaging Agent reconciles attachments to the messaging server 4. On the Supported Attachment Server instances tab, click the Edit icon for the BlackBerry Attachment Service that you want to support additional file formats. 5. In the field at the bottom of the Extensions list, type the extension of the file format that you want to add. 6. Click the Add icon. 7. Repeat steps 4 to 6 for each BlackBerry Attachment Service that you want to add additional file formats to. 8. Click Save all. Changing how the BlackBerry Messaging Agent reconciles attachments to the messaging server The BlackBerry® Messaging Agent receives message attachments from supported BlackBerry devices and reconciles the attachments to the messaging server. The BlackBerry Attachment Service does not convert the attachments. The entries in the CMIME service book on BlackBerry devices indicate whether the BlackBerry® Enterprise Server supports attachments that users send from their BlackBerry devices. Users must have BlackBerry® Desktop Software version 4.2 or later installed on their computers to make sure that these service book entries remain on their BlackBerry devices during service book updates over a physical connection to a computer that is running the BlackBerry Desktop Software. By default, the BlackBerry Messaging Agent limits the file size of attachments that it can receive from a BlackBerry device to a maximum of 3 MB. If the BlackBerry Messaging Agent receives more than one attachment at a time, it limits the total file size of all of the attachments to a maximum of 5 MB. Data that a BlackBerry device and the messaging server send each other over the wireless network must be in packets that are no larger than 64 KB. If a BlackBerry device sends an attachment that is larger than a single packet, the BlackBerry device divides the attachment into multiple packets. The BlackBerry Messaging Agent caches all of the packets and sends the attachment to the messaging server after it receives the last packet. You can optimize the amount of memory, amount of hard disk space, and number of transactions that the BlackBerry Messaging Agent uses while it receives attachments by changing the maximum file size for attachments or preventing users from sending large attachments. 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. 311