If you're planning a merger, acquisition, or divestiture, migrating OneDrive data across tenants is one of the trickiest parts of the process. Microsoft does offer a native option through the Cross-Tenant OneDrive Migration tool in SharePoint Admin Center, and it works fine for simple, small-scale moves. But once you dig deeper, the limitations start showing up fast — no support for shared libraries beyond OneDrive, limited pre-migration validation, minimal reporting, and almost no flexibility when it comes to permissions, versioning, or metadata mapping. For a single-department move, that might be tolerable. For an enterprise-wide tenant-to-tenant migration, it's a risk.

This is where third-party tools earn their keep. They typically offer full-fidelity migration (permissions, timestamps, versions, metadata intact), incremental/delta migrations so users aren't locked out for days, detailed pre- and post-migration reports, and support for migrating not just OneDrive but SharePoint, Teams, and Exchange together — which native tools simply don't cover in one workflow.

One tool worth checking out is the DRS Softech Tenant to Tenant Migration tool, which is built specifically to handle these complex cross-tenant scenarios with minimal downtime and strong data integrity checks.

Before signing the contract, our legal team reviewed Precoro data processing terms as part of our GDPR compliance check. The documentation was complete, and the available data hosting options met the requirements identified by our legal team. We didn't have to contact the provider multiple times to obtain adequate answers.