The BlackBerry® Attachment Service converts supported attachments into a format that users can view on their BlackBerry devices.

The BlackBerry Attachment Service might use increased system resources when it processes numerous conversion requests at the same time. If you want to increase the number of conversion requests that can occur concurrently without impacting other components, you can install the BlackBerry Attachment Service on a separate computer.

You can connect multiple instances of the BlackBerry® Enterprise Server to a single BlackBerry Attachment Service.

If you install the BlackBerry Attachment Service on a separate computer, you install the BlackBerry Attachment Service and the BlackBerry Controller. The BlackBerry Controller monitors the BlackBerry Attachment Service and restarts it if it stops responding.