What is GAMMO?

Google Apps Migration for Microsoft® Outlook (GAMMO) is a desktop utility that lets Microsoft Outlook users import 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 GAMMO, 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 email 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)

Note: GAMMO imports only your personal contacts, not your organization's Global Address List. Global addresses are instead imported by your domain administrator using a utility such as Google Apps Directory Sync.