Google Apps Migration For download

v4.0 [Oct 3, 2015]
Click-To-Run editions of Outlook 2013 and Outlook 2016 are now supported.
Windows 10 is now supported.
Migrates email using the Gmail API.
Removed deprecated 2-legged OAuth command line options --google_consumer_key and --google_consumer_secret.
Support Service Account authentication to migrate on behalf of a user from command line using --service_account_json_path option. See Run migration from command line for details.
Optionally collect and report crash data.

v2.1 [Apr 28, 2011]
Google Apps Migration now supports using 3-legged OAuth for migrating users' mail, contacts, and calendar data to Google Apps. When running the migration utility, users can now sign in to their Google Apps account via a Single Sign On (SSO) system—using their current service's login credentials, rather than their Google Apps credentials.
3-legged OAuth is also more secure since users can explicitly grant access to their account and then revoke it any time.
It also supports a new command-line flag to disable calendar fanouts, creating events only for the user whose data is being migrated—without adding the event to calendars of other attendees. This new flag is useful when performing test migrations.