Where is my Outlook Outbox on Mac MS office 2011?

I need to delete an unsent email but cannot find my outbox in outlook email. It is not showing on the navigation pane at all, I tried preferences and nothing there shows how to view my outbox. Now I cannot send any other emails because this email is still trying to send  and I know it is because it is too large, but I can't find it to delete it.

I tried closing out of outlook and rebooting and it is still sitting there. It is not in draft folder either.

Can anyone help?

Thanks!