AppleScript to find lost Outlook mail and archive them
Outlook mails are not saved individually as files- under normal uses!

They are  part of the Outlook database located here:

Outlook 2011 (Mac version) saves all data in:

~/Documents/Microsoft User data/Main identity


Database: Microsoft Outlook Database

or the respective Backup folder (if you Backed up emails)

You can open one of those and find your emails there.

An Automator script would not do much here, since using Outlook is faster and better to find emails in Outlook database.