The DeliveryStatusOnStartup queue is used by content replication for the removal of failed or undelivered messages. The queue starts shortly after the method server starts and works through all of the failed or undelivered messages.

References to the internal content replication messaging system are placed in the queue entries. If there are failed entries, this means that not all failed messages could be deleted. The failed entries can be removed from the queue. When the method server is restarted, all of the necessary information will be gathered again.

There are two scenarios when the DeliveryStatusOnStartup queue is heavily used: