Google Apps Migration for Microsoft Outlook is a desktop utility that lets Microsoft Outlook® users import your existing mail, personal contacts, and calendar events from a Microsoft® Exchange account or PST file into any Google Apps account. You can configure and run your migration by stepping through an easy-to-follow wizard. You can also run the utility as a command line tool.
With Google Apps Migration for Microsoft Outlook, you can:
Import mail, calendars, and personal contacts, either all at once or in separate stages Import only mail sent before or after a specific date Skip importing Junk E-mail and Deleted items Exclude specific mail folders from being imported (requires running the command-line utility) Monitor the progress of your migration Easily pause and resume the migration Run subsequent migrations that import only new data (not data that's already been imported)