Merging two Office 365 tenants due to company acquisition was a major project for our IT department. The goal was to ensure business continuity while moving over 500 mailboxes to the new tenant without disrupting daily operations. After evaluating several tools, we found that MailsDaddy Cross-Tenant Migration Service stood out because of its rich features and enterprise-grade support.
We didn’t have to install any software—everything was managed from a browser interface. The migration process was clearly structured: authenticate both tenants, map users, apply filters, and launch the migration. Thanks to its delta sync feature, we could run test migrations first and then transfer new data just before the final switch.
Shared mailboxes, OneDrive files, calendars, and contact lists all migrated seamlessly. Permissions and sharing rules were retained as expected. We particularly appreciated the error logs and summary reports that allowed us to review and verify data integrity.
The support from MailsDaddy was also excellent. They guided us through best practices, configuration steps, and optimized scheduling to ensure zero data loss. It’s a powerful solution for Office 365 cross-tenant migration and simplifies what would otherwise be a very complex task.
Visit here: Cross Tenant Migration Service - Office 365/Exchange Online
We didn’t have to install any software—everything was managed from a browser interface. The migration process was clearly structured: authenticate both tenants, map users, apply filters, and launch the migration. Thanks to its delta sync feature, we could run test migrations first and then transfer new data just before the final switch.
Shared mailboxes, OneDrive files, calendars, and contact lists all migrated seamlessly. Permissions and sharing rules were retained as expected. We particularly appreciated the error logs and summary reports that allowed us to review and verify data integrity.
The support from MailsDaddy was also excellent. They guided us through best practices, configuration steps, and optimized scheduling to ensure zero data loss. It’s a powerful solution for Office 365 cross-tenant migration and simplifies what would otherwise be a very complex task.
Visit here: Cross Tenant Migration Service - Office 365/Exchange Online