Migrating from Microsoft 365 to Google Workspace

We move mailboxes, calendars, contacts and files from Microsoft 365 to Google Workspace without collecting passwords: the administrators on both sides grant access, and Loomigrate copies the data in the background. You can check the first 200 items from 3 mailboxes for free.

Before you start

• In Google Workspace add and verify your domain (during the migration you can start with an auxiliary domain) and create users with licenses.
• On the Microsoft side you need an administrator who registers an application (Entra ID) with access to mailboxes and approves the permissions. The wizard tells you which ones.
• On the Google side a super administrator enables domain-wide delegation for the service account. The instructions are in the help inside the panel.
• List what you are moving: mail, calendars, contacts, OneDrive (to Google Drive) and SharePoint libraries (to shared drives). You pick the modules separately in the wizard.
• A day earlier lower the TTL of your MX records to 300 seconds.

Step by step in Loomigrate

1. Create an account on loomigrate.com and open the "New migration" wizard. Choose "Microsoft 365 (whole organization)" as the source and "Google Workspace (whole domain)" as the destination.
2. Provide the Microsoft application and Google service account details. The wizard tells you where to find them.
3. Fetch the list of users and match source mailboxes to destination ones. Identical addresses link automatically, renamed ones you fix by hand.
4. Click "Test connections", then run the "Free test" on a few mailboxes (up to 200 items from each).
5. Mail is one project. Calendars, contacts and files you add as separate projects in the same wizard.
6. Start the full migration. Progress is live, and interrupted tasks can be resumed.

What to watch out for

• Outlook color categories have no direct equivalent in Gmail. Folders become labels, and the subfolder structure is preserved.
• Shared mailboxes, public folders and Teams chats are not part of the mail migration. Recreate shared mailboxes in Google as groups or delegated accounts.
• Google limits the daily data transfer through its mail interfaces. Very large mailboxes can take several days, but a task has no time limit and resumes where it stopped.
• Teams meeting links in old invitations remain in the calendar, but new meetings will use Google Meet.

The mail switch and final steps

1. Run a last sync right before the change.
2. In DNS replace the Microsoft MX record with the records from the Google admin console (for example smtp.google.com).
3. In SPF replace include:spf.protection.outlook.com with include:_spf.google.com. Generate a DKIM key in the Google console (Gmail → Authenticate email) and add the TXT record. Remove the autodiscover record.
4. Update users' mail apps and phones to Gmail.
5. For 30 days after completion you can re-run the sync free of charge. Cancel the Microsoft 365 subscription only after you have checked that nothing is missing.

What it costs

A mailbox (mail, calendar and contacts together) costs €10 net, a personal drive €3, a shared drive €19. A volume discount applies from 50 accounts in a project.

Frequently asked questions