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About GWMMO

Google Workspace Migration for Microsoft Outlook

As an administrator for your organization, you can use Google Workspace Migration for Microsoft Outlook (GWMMO) to let your users import mail, calendar events, and personal contacts from a Microsoft Exchange account or a local PST file to a Google Workspace account. You can migrate data on behalf of a single user using the command-line version of the product.

What data can users import?

  • Mail, calendar, and contact data (all at once or in separate stages)
  • Mail sent before or after a specific date

What can you exclude from a migration?

  • Junk mail and deleted items
  • Specific mail folders for a single user (admins only, from the command-line version)

System requirements

Microsoft Windows 32- and 64-bit versions of Windows Vista*, 7*, 8*, 10, and 11

Update to the latest patches for your Windows version.

Microsoft Outlook
  • Outlook 2003 SP3* or 2007 SP2* (or SP1 with hotfix)*
  • 32- and 64-bit versions of Outlook 2010*, 2013*, 2016, 2019, and 2021
  • Outlook from Microsoft 365 desktop app (not web version)

* Microsoft no longer supports these versions. Upgrade to a supported version.

What’s not supported

  • macOS
  • Windows XP and Server 2003
  • 64-bit version of Office on ARM devices
  • Outlook from Microsoft 365 (web, Android, macOS, and iOS versions) and Outlook from Microsoft Store

    Switch to a supported Windows version of Outlook.

Related topic


Google, Google Workspace, and related marks and logos are trademarks of Google LLC. All other company and product names are trademarks of the companies with which they are associated.

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