Once you have connected two backlogs via an Info Stream, you can push stories from the source stream to the target stream.
Prerequisite: You must have an Info Stream connecting the source and target backlogs.
Submitting a story from the source backlog to the target backlog does not automatically add the story to the target backlog. The project administrator can accept or reject any story that is submitted. Rejected stories can be resubmitted at a later date.
The status of stories submitted to other backlogs can be tracked in the Outbox of the original project's Info Streams management panel. The owner of the target backlog will see the story in the Info Stream panel Inbox. The owner can then either accept or reject adding the story to the target backlog.