Migrate Office 365 One Tenant to Another Tenant

Just wanted to share how we recently migrated 300+ Microsoft 365 users over a single weekend using MailsDaddy Cross-Tenant Migration Service—with zero user complaints on Monday morning.

Our business underwent a name and domain change, which required all users and data to be migrated from our old tenant to the new one. We looked for a migration service that could handle mailboxes, OneDrive, archives, calendars, and permissions without downtime—and we found exactly that in MailsDaddy.

We kicked off a pilot batch first, reviewed the logs, and then scheduled the main migration to begin Friday evening. The ability to map users using CSV, apply filters, and use delta sync was game-changing. It ensured everything was migrated accurately, and only new data was transferred during final cutover.

The entire process was managed from a secure cloud interface, using OAuth and Microsoft Graph API for compliance. Real-time progress tracking made project management easy.

We completed the migration with full folder structures, access rights, and user data preserved. No user data was lost, and their support team was there from start to finish.

If you're facing a tight migration window, this service is the one to trust: https://www.mailsdaddy.com/services/cross-tenant-migration.php

Watch video for Free Microsoft Tenant Migration:

https://www.youtube.com/watch?v=BjMrYwTgjp0