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Entra ID Multi-Tenant Organizations

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Entra ID Multi-Tenant Organizations

MTO is Microsoft's modern model for running multiple Microsoft 365 tenants as one organisation. Here's what it provides.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-id-multi-tenant-organizations

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What is a Multi-Tenant Organization in Entra ID?

A configuration where several Entra tenants owned by the same organisation form a group with cross-tenant sync and trust settings applied consistently, so users across tenants get improved Teams and people-search experi…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-id-multi-tenant-organizations

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Does MTO merge tenants?

No. Each tenant stays separate with its own admins, licences, and policies. MTO synchronises users across them and configures trust; it does not consolidate. A tenant-to-tenant migration is still the route to one tenant.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-id-multi-tenant-organizations

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When should I use MTO instead of migrating to one tenant?

When consolidation is not feasible in the near term — regulatory separation, a long M&A integration, or different security postures — but users need to collaborate as one company in Teams. MTO reduces friction; it does…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-id-multi-tenant-organizations

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