Moving from Google Workspace to Microsoft 365 changes the work environment, not just the email service. Gmail, Drive, calendars and identities connect to established habits and applications. Good preparation distinguishes what can be transferred, what needs conversion and what needs a different structure.
Confirm why you are moving
Write down what the migration should improve: compatibility with Office documents, collaboration with particular partners, administration or tool consolidation. Also identify what works well in Google and needs to be preserved in another way.
If the decision is still open, start with the Microsoft 365 and Google Workspace comparison. Migration takes real effort and should have a clear reason tied to how your team works.
Inventory data and dependencies
List users, aliases, groups, shared calendars and delegated access. In Drive, distinguish individual files, shared drives and documents owned outside the organization.
Include applications that use “Sign in with Google,” forms, scripts and automations. Changing email platforms does not automatically transfer these dependencies to a Microsoft account.
For each collection of data, document its owner, permissions, destination and retention requirements. A file shared with your organization is not necessarily one it owns or can migrate.
Plan where files will live
Decide which documents belong to an individual and which belong to the team. In Microsoft 365, individual and collaborative needs may lead to different destinations, including OneDrive and SharePoint.
Avoid copying the entire folder structure without considering accountability. Define libraries, access groups and external sharing rules. Test permissions with representative user profiles, not only an administrator account.
Check conversions and limitations
Google Docs, Sheets and Slides files may need conversion. Test formatting, specific functions, links and unusual behaviours using a representative sample.
Depending on the selected tools and methods, comments, version history, shortcuts, shared links and permissions may not be preserved exactly. Google Forms and Apps Script require separate assessment. Copying files does not recreate an application.
Make an explicit list of exclusions, expected transformations and manual checks. Consult Microsoft’s migration documentation to confirm available methods and prerequisites at the time of the project.
Test email and the return to everyday work
Prepare Exchange Online, licences and accounts before the pilot. Verify how the chosen method handles email, calendars, contacts and shared items. Do not assume Gmail labels and Outlook folders behave identically in every migration scenario.
Test a representative user, a large mailbox and shared use cases if you have them. Confirm access to messages and files, followed by sign-in on computers and mobile devices.
The guide to preparing a Microsoft 365 migration covers communication, pilot work and fallback planning.
Plan domain changes and source closure
Plan email records and authorized senders: MX, SPF, DKIM and DMARC. Check applications that send messages for the domain. DNS changes may be observed at different times because of caching, so allow for a monitoring period.
After cutover, review results, errors and differences. Retain Google access according to the agreed plan, then close services only after the responsible people have validated the result and retention needs. Cancelling too early can make an overlooked item harder to recover.
Frequently asked questions
Will all Google Drive links keep working?
Do not assume so. Links inside documents, bookmarks and links shared with partners may need updating. Prepare communications for important shared spaces.
Can we migrate groups of users separately?
That may be possible depending on the method and context, but coexistence adds routing, calendar and support considerations. It needs to be designed and tested rather than improvised.
When should employees be trained?
Prepare them before cutover using real work scenarios, then provide support at launch. Finding a file, sharing a document and managing appointments are often more useful than touring every feature.
Learn about NetBLB’s migration support or describe your project to clarify the data, users and timing involved.