The content provider sends the <subscriptionquery-message> element to the BlackBerry® Infrastructure to determine the status of each PIN, or each PIN with a specified status.
You can use a subscription query message to reconcile your information with the BlackBerry Infrastructure information. To prevent accidental cancellations, you should reconcile the subscription information once a month.
To avoid overloading servers, you can send this message only 100 times in 10 minutes. Each call can contain up to 10,000 addresses, which means that up to 1,000,000 PINs can be synchronized in 10 minutes.