I had Outlook 2010 fetch my Gmail over IMAP into my .pst file. I upgraded to Office 2013 and Outlook 2013 decides to import the email settings (like username, server and password) just fine - but decided to redownload the entire inbox (4gb+) all over again. I have multiple gmails (personal + work) and it's doing that to all.
I have deleted the accounts since I don't want to redownload everything.
How can I supply Outlook 2013 my existing email settings (Gmail IMAP) and then tell it "it's already in this pst file, use that instead of redownloading everything".