As enterprises continue to scale, merge, or restructure, managing Microsoft 365 tenants becomes a common challenge. Organizations often face two major choices when consolidating or collaborating across tenants: Microsoft Multi-Tenant Organization (MTO)  – a feature that allows seamless collaboration across multiple tenants without merging them. Tenant-to-Tenant Migration  – the traditional approach of consolidating workloads and identities into a single Microsoft 365 tenant.