Cross-tenant user data migration

Microsoft 365 Cross-tenant User Data Migration helps organizations securely move user data between Microsoft 365 tenants during mergers, acquisitions, or reorganizations. Built on Microsoft’s native migration framework, it supports moving Exchange Online mailboxes, OneDrive files, and select Teams chat data with tenant-to-tenant trust, consent, and throttling controls managed by admins. This feature reduces downtime, preserves data fidelity, and maintains compliance with Microsoft security and audit standards. Admins can configure source and target mappings, validate readiness, and execute staged migrations to minimize impact on users. Cross-tenant migration also supports domain move scenarios and coexistence planning. Rely on Microsoft documentation and tools to streamline planning, cutover, and post-migration validation for a predictable, governed transition.

Sources: Microsoft Learn – Cross-tenant migration for Exchange, OneDrive, and Teams.