Anyone Successfully Migrated Multiple Personal Gmail Accounts to Office 365 Without Errors?
I'm currently helping a small office move from personal Gmail accounts to Microsoft 365, and the experience has been much harder than expected. Microsoft recommends IMAP migration, but after several test runs we discovered it only brings across emails. Contacts, calendars, and other mailbox data still have to be exported and imported separately. On top of that, two user accounts kept showing authentication errors, even after creating App Passwords and checking every setting multiple times. With eight employees waiting for their new mailboxes, spending several hours fixing each account manually isn't something we'd like to continue doing.
While researching alternatives, I kept seeing positive discussions about the DRS Softech Gmail Backup Tool. It appears to provide a much more complete migration by transferring emails, contacts, calendars, tasks, notes, and attachments in one workflow instead of splitting everything into separate manual processes. I also liked the Preview feature because we can verify mailbox content before starting the migration. Date Filter, Remove Duplicate Emails, and support for batch processing seem especially useful for organizations that don't want to waste time moving unnecessary data. Since our office uses both Windows and Mac systems, cross-platform compatibility was another reason it caught my attention.
After reading more case studies and comparing different migration methods, it became clear why so many administrators recommend using specialized software when they need to migrate Gmail to Office 365. Having a single solution that supports multiple accounts, preserves mailbox integrity, and minimizes migration failures is much more reassuring than relying only on IMAP. If you've completed a migration from personal Gmail accounts instead of Google Workspace, I'd love to hear which approach gave you the smoothest results and whether you encountered similar authentication or mailbox transfer issues.
Comments
Yes, I migrated multiple personal Gmail accounts to Microsoft 365 without any major issues. I first enabled IMAP in every Gmail account and tested the migration with one mailbox before moving the rest. That helped me identify folder mapping issues early and avoid mistakes.
For a few small accounts, the manual IMAP method works fine. But when I had several mailboxes with years of emails, it became slow and difficult to manage. Then I used the TrustVare IMAP Migration Tool to migrate the accounts more efficiently while keeping emails and folder structure intact. My advice is to test first and always keep a backup before migrating.