I’m writing this as a detailed review of our experience with MailsDaddy Cross-Tenant Migration Service, which we used for a full Microsoft 365 to Microsoft 365 tenant migration. Our company was undergoing restructuring, and we had to migrate 500+ users, including their mailboxes, calendars, OneDrive files, and shared data.
I was skeptical at first, given the sensitivity of user data and how easily things can go wrong. But MailsDaddy made the entire process smooth and stress-free. First, it uses Microsoft Graph API for secure connections, so there's no risk of data interception. Second, it’s 100% cloud-based—no local setups or server dependencies.
We loved how easy it was to import user lists and map them from source to target tenant using CSV files. Even better, we had complete control with scheduling, filtering by date, folder, and item types. The migration logs and reports were clear, and the support team was very responsive.
I highly recommend it for MSPs, system integrators, or internal IT teams managing high-stakes tenant migration projects. It’s professional, flexible, and designed to handle everything from small migrations to enterprise-scale transitions.
Here’s the link:: https://www.mailsdaddy.com/services/cross-tenant-migration.php