To ensure a secure and compliant first-party solution, it was imperative to integrate Mover's 3P cloud migrations within the admin center and offer a consistent experience with the on-prem file share migrations. We didn't bring in the tenant-to-tenant to MM because a faster technology is being offered through the cross-tenant tool (https://learn.microsoft.com/en-us/microsoft-365/enterprise/cross-tenant-onedrive-migration?view=o365-worldwide). This tool moves references within the Microsoft tenants (unlike Mover, which moves bytes, which is prone to double-throttling from source and destination) and offers significantly higher throughput.