Just wanted to share a great experience I had with a cross-tenant Microsoft 365 migration. I was responsible for migrating about 500+ users from one M365 tenant to another after a corporate acquisition. Sound daunting? It was—until I found MailsDaddy Cross-Tenant Migration.

This service was a lifesaver. It handled everything—user mailboxes, archive mailboxes, OneDrive data, and more. No data loss, no downtime. I could schedule and automate the entire migration process, which made it so much easier to manage.

Their interface is intuitive, and they even support selective migration through date and folder filters. I was also able to map source and destination users easily through a CSV.

I highly recommend checking out their service if you’re dealing with tenant-to-tenant migration in Office 365. Here's their link:Tenant to Tenant Migration

Hope this helps someone save as much time as I did!