How to migrate company email from Google Workspace to Microsoft 365
Migrating email between cloud office platforms requires moving all messages while managing user accounts and running both systems concurrently during the transition. Without a clear migration path, businesses risk losing access to their company email for sending and receiving, resulting in months of locked-out accounts and disrupted operations.
What the numbers show
Counted from the threads quoted below. How we count
- The most recent one is from October 2026.
- This comes up 37.5× more often in r/sysadmin than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Using BitTitan to assist with migration in batches over a weekendDid this help you?
- 2Utilizing Google's simplified migration toolsDid this help you?
- 3Adopting Entra ID (Azure AD) and Intune instead of building an on-premises Active Directory and custom imaging systemDid this help you?
- 4Spending hours on the phone with unprepared operatives or AI chatDid this help you?
- 5Canceling the subscription and reorganizing digital marketing from scratchDid this help you?
- 6Using Google Takeout to export mbox files and converting them to PSTDid this help you?
- 7Connecting via IMAP in Outlook or Thunderbird to manually drag and drop emails into subfoldersDid this help you?
- 8Using native migration tools or third-party servicesDid this help you?
- 9Making the new email client optionalDid this help you?
- 10Sticking with the old version of the softwareDid this help you?
- 11Adapting workflows to use alternative features like pinning instead of flagsDid this help you?
- 12using webmailDid this help you?
- 13Using third-party migration tools like Quest to set up user migration and forwardingDid this help you?
- 14Using Microsoft's native cross-tenant mailbox migration tool which automatically converts source mailboxes to MailUsers with external email addresses pointed to the new routing addressDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“since they partner with Wix I've been unable to use my company email. for sending or receiving business email.”source ↗
“result I've been paying the Mounty fee for the last two months without be able to access my business email, creating a big amount of problem to my business.”source ↗
“Aside from using Google Takeout and then converting the mbox to PST... is there an alternative solution out there for migrating from a personal gmail to Office365?”source ↗
“I understand that M365 does not use tags so I'd like this solution to map tags to subfolders.”source ↗
“Cannot use a distribution list to add multiple calendars automatically.”source ↗
“Public folders.”source ↗
“Half of the mailboxes will be migrated over to the new tenant (newdomain.com), and half remaining on the old tenant (olddomain.com). Is it possible for email to be sent and received for the old domain without taking ownership of the new domain and modifying DNS to the new tenant?”source ↗
“New to this side of the field and need to get pricing and info on the switch. Would be looking to build and use an MS AD domain as well. Amy pointers or links appreciated.”source ↗
“I just recreate the users but do need to migrate all of the emails. Looking to run concurrently for a bit until this is set up and then switch over totally.”source ↗
“Unteranderem ist ein teil davon das ich bestehende Konten welche aktuell über ein DC laufen ins Entra bringen kann. Die Konten sollen aber bestehen bleiben genauso wie die Daten welchen drauf sind.”source ↗
Where this came up
People with this problem also raised
- 2Gotchas when migrating user files to OneDrive
- 8Migrating a child Active Directory into a parent domain
- 4How to migrate remote management platforms without rebuilding everything
- 4Moving a virtual domain controller without a USN rollback
- 14Why is it so hard to export and switch accounting software?
- 3What to do when your cloud service suddenly shuts down