Export written tapes after multiple backup jobs?

Here's the scenario:

Running BackupExec 2012.  Quantum Scalar i40 library with mailslots set up.  Roughly 40 backup jobs per night to tape.  I'm trying to figure out how to export the media that has been written to the mail slot after the last job runs.  Do I just need to schedule an export job to run after the last backup completes, or will that export all the media in the library?  The jobs usually span a couple of tapes(1-2 for incrementals, 3-4 for the full backups).