I moved the contents of the inbox folder from the pop3 account pst inside of outlook 2007 into the imap inbox in the same profile (drag and drop). When it was done, the emails were not visible in the new inbox folder but the pst file was 1.25GB. This was done before the DNS pointed to the new server so server side nothing was happening, just locally to the pst. The imap server is through rackspace.com.