In a cross-tenant migration, organizations typically migrate mailboxes, SharePoint, and OneDrive data first, then transfer the domain during a maintenance window by removing it from the source tenant and adding it to the destination tenant. Tools like the SysInfo Microsoft 365 Tenant-to-Tenant Migration Tool can migrate data while the domain move is planned separately, helping minimize downtime. More: https://www.sysinfotools.com/o365-tenant-to-tenant-migration.php