Google Workspace to Microsoft Exchange Migration: Step-by-Step Guide
What happens when your company moves from Google Workspace to Microsoft Exchange, but the migration plan only covers email?
The user cannot locate a major date on the calendar. Business applications still transfer emails from Gmail. A delegated inbox must be configured even further. Now the IT is investigating whether the messages were deleted or affected by the existing retention policy. The mailbox transfer may have completed successfully, but the migration has not.
A Google Workspace to Exchange Online migration involves much more than moving Gmail messages. Users, domains, email delivery, calendars, contacts, identities, permissions, security controls, applications, and post-migration validation all need to be considered.
Microsoft now provides an automated Google Workspace migration experience through the Exchange Admin Center, reducing several manual configuration steps that were previously required. The challenge is making the transition without disrupting business communication. In this blog, you will get a practical step-by-step approach to planning and executing the migration.
Are you planning a Google Workspace to Microsoft 365 migration?
Talk to Evolvous to assess your environment and build a migration strategy designed around your business requirements.
Why Migrate from Google Workspace to Microsoft Exchange?
Migrating should begin with business needs, rather than with the tool itself. Organizations often migrate from Google Workspace to Microsoft exchange to unify productivity, identities, collaboration, security, and applications.
This is reflected in Microsoft’s current migration recommendations that separate the workloads: Exchange Online will take care of emails, calendars, and contacts, while Migration Manager will take care of transferring Google Drive contents into OneDrive or SharePoint.
Consultant advice: Define the complete migration scope before touching a mailbox. If you plan for migrating Gmail, but forget about shared drives, delegated access, business applications, or domain dependencies, your technical migration might be successful, but the business migration might very well fail.
How Do You Migrate Google Workspace to Exchange Online?
Step 1: Prepare your Microsoft 365 environment for migration
If you currently use Google Workspace, what does the prospect of moving over to Microsoft 365 entail?
Before you make the switch, here are some things you will need to do regarding Microsoft 365 specifically: setting up your tenant, licenses, users, administrative roles, and Exchange Online accounts.
Another thing to consider is that Microsoft requires proper provisioning of users to be migrated as well as adequate mail-routing configurations beforehand. Considerations before migration:
- Microsoft Entra ID
- MFA and authentication
- Security features
- Outlook
- Mobile access
- Compliance and retention
- Provisioning
A smarter approach
Set up Microsoft 365 first, test it with a small group, and make sure your target environment is operational before moving production data.
You are not just changing an email provider. You are changing the foundation on which users access Microsoft 365 services.
Step 2: Configure Google Workspace
Microsoft’s automated migration process requires that you configure Google Cloud. You must set up a project, service account, service key, and be granted access to Gmail, Calendar, and Contacts APIs.
You should also check for any Google-specific configuration issues that may not match up with Exchange Online. Check the following:
- Gmail delegation
- Google Groups
- Calendar sharing
- Meeting rooms
- Gmail labels
- Third-party plugins
- Automatic forwarding
- Archiving and retention
One particularly important Microsoft warning concerns messaging records management and archive policies. Microsoft notes that messages moved or deleted by these policies can be reported as “missing” during migration verification.
Expert advice: Do not interpret every migration warning as data loss. First establish whether the source mailbox has an active retention or archival policy affecting the comparison.
Step 3: Verify the Domain and Mail-Flow Strategy
The project consists of the following significant details.
Suppose only 100 employees use Google Workspace, whereas 50 employees have already switched to Microsoft 365 services. Can both groups remain connected via emails?
Yes, they can!
During the Microsoft migration process, the email routing sub-domains come into action, which lets both groups communicate as usual while the migration progresses. Important points to be covered before the production cutover are as follows:
- Routing information when moving from Google to Microsoft
- Routing information when moving from Microsoft to Google
- MX records
- SPF, DKIM and DMARC
- DNS TTLs
- Application-generated emails
- Internally generated emails
- Externally generated emails
Step 4: Provision Users and Target Mailboxes
At first, this seems easy until you suddenly come across a case of 3 users having the same address, an old alias used by the clients, and an account for the department which was not considered during migration.
Microsoft makes it necessary that necessary users and proxy addresses are provisioned before migration. It makes sense to validate the following before preparing the migration CSV:
- Aliases
- Usernames
- Duplicate accounts
- Inactive accounts
- Delegated users
- Share resources
Step 5: Configure the Exchange Online Migration
As soon as the source and target workplaces are set up, the migration process becomes much easier.
In the Exchange Admin Center, you can set up a migration batch, choose Google Workspace (Gmail) for the migration option, set up the migration endpoint, and add users via a CSV file.
The automated process works well with the following functions:
- Calendar
- Contacts
- Rules
Moreover, Microsoft makes the migration process more manageable. With Exchange Admin Center, large companies can implement staged migration to save time and effort.
But do not confuse technical simplicity with project simplicity.
Deciding who moves when, what gets tested, what happens to exceptions, and when the business is ready for cutover still requires judgement.
Step 6: Run a Pilot Migration
You should not start your first testing with the whole establishment. Get a representative sample for a pilot with various mailbox sizes, departments, device types, and usage habits.
Make sure to verify:
- Rules
- Email history
- Calendar information
- Contacts
- Rules
- Delegation
- Access to Outlook
- Mobile access
- Internal mail flow
- External mail flow
The pilot needs to be utilized to assess your support process as well. If you need to set up new Outlook accounts or mobile phones, find out beforehand what challenges you might run into.
Step 7: Migrate Users in Controlled Batches
In theory, it seems feasible for you to migrate your emails. But it is better not to do it.
For medium to large companies, batch migrations are preferable as they are easier to control and support. Microsoft states that batch migrations are the best option for mail migration for companies with several users.
Begin with only a small group, supervise its operation, errors, and comments from users. Then proceed further.
Your migration schedule should also consider business calendars. Moving a sales team during quarter-end or a support team during peak customer activity may create unnecessary risk even if the technology is ready.
Step 8: Validate, Stabilize, and Retire Google Workspace
Post-migration validation refers to how migration professionals handle migrations the right way and ensures correct data migration rather than simple data transfers.
Things to check are:
- Mailbox completeness
- New and old messages
- Calendars and contacts
- Aliases and delegates
- Outlook access and configuration
- Mobile access
- Security policies
- Applications mail flow
- DNS settings
- User access and authentication
Once validation is complete, document the migration, resolve outstanding issues, communicate the new operating model to users, and only then plan the retirement of Google Workspace.
Ready to Make the Switch Without the Risk?
Evolvous helps you identify migration risks, test critical dependencies, and plan a controlled Microsoft 365 cutover.
What About Google Drive and the Rest of Google Workspace?
Here is a distinction that can save your migration project from scope problems:
Moving Gmail to Exchange Online is different from migrating Google Workspace to Microsoft 365.
Email, calendars, and contacts follow the Exchange migration path.
Google Drive and shared Drives require a separate migration stream. Microsoft provides Migration Manager for moving Google Drive content to OneDrive and shared-drive content to SharePoint or Teams sites.
So, if your real objective is to migrate Google Workspace to Microsoft Exchange, plan email, files, identity, collaboration, permissions, security, and user adoption as connected workstreams.
Choosing the right migration approach can determine how smoothly the transition goes. For a broader look at cutover, staged, and hybrid migration approaches, see our guide to the Microsoft Exchange migration process.
Also Read: When to Choose Hybrid vs. Staged Migration
How Can Evolvous Be the Right Solution for Microsoft Exchange Migration?
An experienced exchange migration consultant can help you assess the source environment, map users and workloads, design the migration sequence, configure the target environment, manage pilot and production batches, plan the cutover, and validate the results.
Evolvous helps organizations modernize Exchange environments with a structured and business-focused migration approach. From infrastructure assessment and migration planning to post-migration support, Evolvous helps businesses prepare their communication systems for AI-powered operations and long-term digital transformation.
Ready to move from Google Workspace to Microsoft online Exchange?
Talk to our Microsoft migration experts and start with an assessment of your current environment.
Frequently asked questions
1. Can Google Workspace and Microsoft 365 run together during migration?
Yes. A staged migration allows both environments to coexist while users are moved in controlled batches, provided email routing is configured correctly.
2. What happens to Gmail labels during migration?
Gmail labels do not always map directly to Outlook folders, so label structure should be reviewed and tested before the migration begins.
3. Can Google Drive be migrated with Gmail?
Yes, but Google Drive is a separate migration workload. Google Drive and shared Drives require separate planning for OneDrive, SharePoint, or Teams.
4. Do you need a consultant for Google Workspace migration?
Not always. However, complex environments with multiple domains, large user volumes, compliance requirements, or critical applications benefit from expert migration planning and support.
