Yup you just told me!
I get all my Users local PST file that their IMAP mail was making, put it on my desktop.
Then I open up Outlook and go to Email Accounts.
Then I click the option New Outlook Data File
Then it lets me pick my PST file that I saved on my Desktop, and it sets up a new folder with all the IMAP mail in it!
Then I just move all my IMAP mail to the new Outlook PST that I made for them in Exchange!
Then delete the IMAP folder.
nothin else special lol