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How the BlackBerry Attachment Connector communicates with BlackBerry Attachment Service instances

When a user sends a request to view an email message attachment on a BlackBerry® device, the BlackBerry device sends a request to the BlackBerry® Enterprise Server Express to convert the attachment. The BlackBerry Enterprise Server Express uses a BlackBerry Attachment Connector to send the attachment data to a BlackBerry Attachment Service, which processes the request and returns the attachment data to the BlackBerry Attachment Connector. The BlackBerry Enterprise Server Express requests the attachment data from the BlackBerry Attachment Connector and sends the attachment data to the user's BlackBerry device.

By associating multiple BlackBerry Attachment Service instances with a single BlackBerry Attachment Connector, you can create a BlackBerry Attachment Service pool. You can configure different BlackBerry Attachment Service instances as dedicated servers for processing specific file formats. For example, you can create a BlackBerry Attachment Service pool that contains three BlackBerry Attachment Service instances, where one instance processes email message attachments that are in audio file formats, one instance processes email message attachments that are in image file formats, and one instance processes email message attachments that are in all other file formats.

You can change how a BlackBerry Attachment Connector processes attachment requests that it cannot deliver to a BlackBerry Attachment Service, and you can change how a BlackBerry Attachment Connector restores a lost connection to a BlackBerry Attachment Service.

Change how a BlackBerry Attachment Connector retries sending requests to a BlackBerry Attachment Service

The BlackBerry® Attachment Connector sends requests to view attachments from users' BlackBerry devices to a BlackBerry Attachment Service. You can change how a BlackBerry Attachment Connector processes attachment requests that it cannot deliver to a BlackBerry Attachment Service.

Depending on the number of users in your organization's environment, if you change the BlackBerry Attachment Connector settings, your organization's environment might experience a performance impact.

  1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > Attachment > Connector.
  2. Click the instance that you want to change.
  3. Click Edit instance.
  4. In the General section, in the Minimum wait for retry per request field, type the amount of time, in milliseconds, that the BlackBerry Attachment Connector waits before it resends a request that is not delivered to a BlackBerry Attachment Service. The default value is 1000 milliseconds.
  5. In the Maximum retries per request field, type the maximum number of times that the BlackBerry Attachment Connector tries to resend a request that is not delivered to a BlackBerry Attachment Service. The default value is 10.
  6. Click Save all.

Change how a BlackBerry Attachment Connector restores a lost connection to a BlackBerry Attachment Service

Based on the number of users in your organization's environment, if you change the BlackBerry® Attachment Connector settings, your organization's environment might experience a performance impact.
  1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > Attachment > Connector.
  2. Click the instance that you want to change.
  3. Click Edit instance.
  4. In the General section, in the Minimum wait to attempt restore of lost connection field, type the amount of time, in milliseconds, that the BlackBerry Attachment Connector waits before it tries to restore a lost connection to a BlackBerry Attachment Service. The default value is 1000 milliseconds.
  5. Click Save all.

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