Google Workspace to Microsoft 365 Migration Checklist
Planning to move Gmail, Google Drive and collaboration into Microsoft 365? Use this checklist to assess the source, prepare the target and avoid cancelling Google before the new environment is proven.
Planning to move Gmail, Google Drive and collaboration into Microsoft 365? Use this checklist to assess the source, prepare the target and avoid cancelling Google before the new environment is proven.
Business Case
- □ Define why the organisation is moving
- □ Define expected benefits
- □ Confirm budget and timescale
- □ Identify executive sponsor
Ownership
- □ Verify Google Super Administrator access
- □ Verify Microsoft Global Administrator access
- □ Confirm tenant ownership
- □ Confirm domain and DNS control
- □ Document supplier responsibilities
Users
- □ Export active users
- □ Identify suspended and former users
- □ Record aliases
- □ Record groups
- □ Record delegated access
Email and Calendars
- □ Measure mailbox sizes
- □ Review labels
- □ Review filters and forwarding
- □ Review shared calendars
- □ Review rooms and resources
Files
- □ Scan My Drives
- □ Scan Shared Drives
- □ Identify Google-native files
- □ Review external sharing
- □ Map owners and permissions
Applications
- □ Identify Google Forms
- □ Identify Apps Script
- □ Identify Google Sites
- □ Identify Sign in with Google dependencies
- □ Identify SMTP systems
Microsoft Target
- □ Assign licences
- □ Configure administrators
- □ Enable MFA
- □ Design OneDrive
- □ Design SharePoint
- □ Design Teams
Security
- □ Configure Conditional Access where licensed
- □ Configure external sharing
- □ Configure Defender where licensed
- □ Confirm audit and retention
- □ Confirm Microsoft 365 backup
Pilot
- □ Select representative users
- □ Test email
- □ Test calendars
- □ Test files
- □ Test permissions
- □ Test devices
Cutover
- □ Complete delta migration
- □ Update DNS
- □ Test mail flow
- □ Reconfigure devices
- □ Support users
Validation
- □ Review failed items
- □ Compare data
- □ Check permissions
- □ Check applications
- □ Complete restore test
Decommission
- □ Address Vault and retention
- □ Transfer Google-authenticated services
- □ Retain source for agreed period
- □ Obtain written approval
- □ Cancel licences only after validation
Do not cancel Google Workspace simply because new email is arriving in Microsoft 365.
Plain-English Takeaway
Complete discovery before quoting, design the Microsoft destination before migrating, run a pilot and retain Google Workspace until data, applications, backup and retention requirements are all confirmed.
Downloadable guide
Google Workspace to Microsoft 365 Migration Checklist
A4 PDF checklist covering business case, ownership, users, email, files, applications, target design, security, pilot, cutover, validation and decommissioning.
Download Checklist (PDF)A4 PDF. Selectable text. Print or use on screen.
Want the full business explanation?
The Technology Intelligence article covers why this matters, where it helps and what to watch out for.
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