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Tenant-to-tenant migration

Moving users, mail, files, and Teams content from one Microsoft 365 tenant into another.

It comes up with mergers, acquisitions, divestitures, and rebrands. It is genuinely involved work: identities, mailboxes, OneDrive and SharePoint content, Teams structure, and licensing all have to move with a coexistence period in between.

The parts people underestimate are shared mailbox permissions, external sharing links that break, and the cutover window for mail routing.

Where this comes up

Tenant-to-tenant migration sits inside our microsoft 365 and cloud work. If you are trying to work out what this means for your own environment rather than in the abstract, that is the page worth reading next, and a short call will get you a straight answer faster than either.

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Related terms

Tenant Your organization's dedicated instance of a cloud service, containing your users, data, and configuration. Cloud migration Moving systems and data from on-premises infrastructure to cloud services. Microsoft 365 Microsoft's subscription bundle of Office applications, email, file storage, collaboration, identity, and security services.

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