A successful
tenant to tenant migration requires more than just data transfer—it demands a solid understanding of Microsoft 365 services, dependency mapping, and a phased rollout plan. To avoid service disruption, IT teams should first identify what data is migrating, who it impacts, and what tools or scripts will be used. Communication and training are equally vital to ensure employees are aware of changes to login credentials, shared drives, or Teams channels.
File data migration is often a bottleneck, particularly in large organizations. A dedicated
OneDrive migration tool can simplify this by supporting concurrent migrations, preserving metadata, and integrating directly with Microsoft Graph APIs. Advanced solutions also include scheduling features, compliance-friendly audit logs, and pre-migration reports that help in identifying any potential user or data issues.
If your migration budget is limited or you're handling only a handful of mailboxes, the Microsoft-supported
native mailbox migration method might be suitable. This video offers an in-depth walkthrough of how to configure source and target tenants, assign migration permissions, and use Exchange Online PowerShell for mailbox moves.
