Microsoft 365 Tenant Consolidation Checklist for IT Teams

Most organizations don’t plan to operate multiple Microsoft 365 tenants, but over time, tenant sprawl becomes difficult to manage and even harder to unwind. By the time consolidation is prioritized, identity, access, and application dependencies are spread across environments in ways that are not always fully visible or understood.

This checklist is designed for the IT teams responsible for planning and executing tenant consolidation. It provides a practical, step‑by‑step guide to what needs to be assessed, validated, and controlled before, during, and after migration to reduce risk, maintain continuity, and ensure the target environment is more secure, consistent, and easier to govern.