Outlook .PST file issue

Hello, Ok, we had a user come over from another ministry. We are on a different domain, with different exchange servers. He has a 2 gig .PST file from his last placement that he wanted access to, so I imported it and now it has mixed everything together, both from this ministry and the one he came from. I thought it would have made a separate spot folder, and called it the name of the .PST file, but alas, it just made a mixed in mess 🙂 Any ideas how to make it do what I wanted it to do?

THX.