You need to be logged in as a member of the University to access this option. After logging in you will see an Outbox option along the top of the screen : 

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Clicking on Outbox will display a list of any files that are waiting on the server for your recipients to pick-up (click to enlarge) :

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Clicking on a Claim ID will take you to the dropoff summary page for that particular drop-off (where you can see information about the file and whether it has been picked up yet - see dropping off files)