Switch from Google Workspace to Microsoft 365: A Complete Migration Guide

General Discussions
1

Switch from Google Workspace to Microsoft 365 can help organizations streamline collaboration, improve productivity, and take advantage of Microsoft’s integrated business ecosystem. However, moving business-critical emails, calendars, contacts, files, and other data requires careful planning to avoid disruption or data loss.

Before starting the migration, identify the Google Workspace data that needs to be transferred. This may include Gmail emails and attachments, Google Drive files, calendars, contacts, and other business information. Creating a secure backup before migration is also recommended so your organization has a reliable copy of its data throughout the transition.

A dedicated MacSonik Google Workspace backup solution can simplify this process. MacSonik Google Workspace Backup Tool supports bulk user backup, incremental processing, advanced filters, duplicate detection, and multiple export formats. It can help administrators preserve mailbox structure, labels, attachments, metadata, and other important information during backup and migration workflows.

Key Steps to Switch from Google Workspace to Microsoft 365

  • Plan the migration: Review users, mailboxes, files, calendars, contacts, and storage requirements.
  • Back up Google Workspace data: Create a secure backup before making major changes to your environment.
  • Prepare Microsoft 365: Configure users, domains, mailboxes, permissions, and required Microsoft 365 services.
  • Migrate business data: Transfer supported Gmail mailbox data and other required information to the Microsoft 365 environment.
  • Verify migrated data: Check emails, folders, attachments, calendars, contacts, and metadata after migration.
  • Complete the transition: Update DNS and mail-flow settings, notify users, and confirm that Microsoft 365 is working correctly.

For organizations with hundreds or thousands of accounts, bulk processing and detailed migration reports can make the transition easier to monitor. Incremental backup and advanced filtering can also reduce unnecessary processing and help administrators focus on required data.

A successful Google Workspace to Microsoft 365 migration is more than simply moving emails. Proper preparation, secure backup, structured migration, and post-migration verification can help businesses transition with greater confidence while protecting valuable organizational data.

2

Moving from Google Workspace to Microsoft 365 requires planning, especially when business mailboxes contain years of emails and custom folders. For email migration, Google Workspace can be treated as an IMAP source and the mailbox data transferred to Microsoft 365.

A practical process is:

  • Create and license the destination Microsoft 365 mailboxes.

  • Check IMAP access for the Google Workspace accounts.

  • Test one mailbox before migrating all users.

  • Use Softaken IMAP to Office 365 Migration Tool to transfer emails directly without creating PST files.

  • Use folder mapping to retain the original mailbox hierarchy.

  • Run incremental sync after the initial migration to copy newly received emails.

  • Verify folders, attachments, and migration reports before final cutover.

For a complete Workspace switch, plan Drive, calendars, contacts, DNS, and domain changes separately because email migration is only one part of the process.

3

Migration between platforms like this always sounds simple on paper but gets complicated fast once you factor in the actual volume of business data involved.

One point I’d add: manual methods (like exporting through Google Takeout and importing into Outlook) can technically work, but they tend to fall apart once you’re migrating more than a few accounts, especially when attachments, folder hierarchies, and calendar data are all in the mix. That’s where a dedicated migration tool really pays off.

I’d recommend looking into Shoviv G Suite to Office 365 Migration for this. It’s built specifically for this kind of transition and handles a lot of the heavy lifting:

  • Migrates complete mailboxes, emails, attachments, calendars, and contacts, while preserving data integrity
  • No size restrictions, and supports batch migration of multiple mailboxes at once
  • Offers filtering by date range and specific folders, so you have full control over what moves and when
  • Lets you schedule migration jobs instead of running everything manually
  • Also supports Google Drive to OneDrive migration, which is easy to overlook but just as important
  • Includes an Incremental Export feature, so interrupted migrations can resume instead of starting from scratch
  • Works with on-premises Exchange Server too, not just Microsoft 365 cloud mailboxes
  • Comes with a free version that lets you test the first 50 items per folder before committing to the full purchase