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Wanted to recommend something that saved my team from a ton of stress—MailsDaddy Cross-Tenant Migration for Office 365.
We had to merge two tenants with hundreds of users, shared mailboxes, and archive data. Most tools we looked at were either overpriced or overly technical. Then we came across MailsDaddy, and it was like finding gold.
Everything was handled online—no local installation, no third-party platforms. You just connect both tenants, map users, apply any filters you need, and let it run. It even supports phased migrations if you want to do it in stages.
Their UI is clean, progress tracking is real-time, and support is fast and knowledgeable. They even help you test before running the full migration.
Check it out if you're managing a big tenant shift:
https://www.mailsdaddy.com/services/cross-tenant-migration.php
If you want to try manual (free) tenant to tenant migration, watch my video:
We had to merge two tenants with hundreds of users, shared mailboxes, and archive data. Most tools we looked at were either overpriced or overly technical. Then we came across MailsDaddy, and it was like finding gold.
Everything was handled online—no local installation, no third-party platforms. You just connect both tenants, map users, apply any filters you need, and let it run. It even supports phased migrations if you want to do it in stages.
Their UI is clean, progress tracking is real-time, and support is fast and knowledgeable. They even help you test before running the full migration.
Check it out if you're managing a big tenant shift:

If you want to try manual (free) tenant to tenant migration, watch my video: