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I am having trouble understanding the docs terminology on Multi Tenant.

Multi-tenant: Azure tenants that access other services in a shared environment, across multiple organizations, are considered multi-tenant.

I understand the concept of a Mult-tenant SaaS database as explained in the docs here which is similar to Wikipedia's explanation

But what is a multi-tenant tenant?

From the same terminology the definition of a tenant is

Azure tenant: A dedicated and trusted instance of Azure AD that's automatically created when your organization signs up for a Microsoft cloud service subscription, such as Microsoft Azure, Microsoft Intune, or Office 365. An Azure tenant represents a single organization.

So presumably a multi tenant tenant represents multiple organisations. I just don't see how.

It is a bit like calling a set a multi-set. A contradiction in terms.

Kirsten
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  • https://serverfault.com/questions/917070/azure-single-tenant-web-app-vs-multi-tenant – Kirsten Sep 24 '19 at 02:07
  • https://serverfault.com/questions/634134/creating-a-multi-tenant-ad-environment?rq=1 – Kirsten Sep 24 '19 at 02:08
  • https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/active-directory-access-create-new-tenant – Kirsten Sep 24 '19 at 04:18
  • Check out Azure B2B and B2C: https://docs.microsoft.com/en-us/azure/active-directory/b2b/what-is-b2b, B2C: https://docs.microsoft.com/en-us/azure/active-directory-b2c/active-directory-b2c-overview comparison of both: https://docs.microsoft.com/en-us/azure/active-directory/b2b/compare-with-b2c – Elliot Huffman Sep 24 '19 at 16:35
  • Thanks @ElliotLabsLLC but these links dont seem to mention multi-tenant tenants. – Kirsten Sep 24 '19 at 19:54
  • They are multi tenants since they span multiple tenants, B2c is bridging your tenant with another partner's tenant (b2b means business to business). b2c is business to customer, it has the ability to federate with various oauth providers, hence spanning multiple tenants. – Elliot Huffman Sep 25 '19 at 14:26
  • Isn't that like saying a set can become a multi-set? It's a contradiction in terms. – Kirsten Sep 25 '19 at 21:00
  • Imagine a service provider that has many customers (companies) they provide IT services for. Each and every customer has their own tenant, but they are hosted as a part of the service providers multi-tenant. None of the customers are able to look at each others tenants, but the service provider is able to change between the customers tenants seamlessly without having to login out/into the different tenants. At least this is how it works with other products/services. However, I'm not sure what MS defines multi-tenant as, so this is just my two cents. :-) – OnkelJ Oct 11 '19 at 12:17
  • @OnkelJ what application woud the service provider be using to look at those tenants? – Kirsten Oct 11 '19 at 21:40
  • Well, as I said, I don’t know the «MS way», but if I’d take a guess, they’d be changing through the web browser’s user icon, and in poweshell with a command and SSO takes care of the authentication, ref: https://serverfault.com/questions/778561/azure-powershell-change-directory – OnkelJ Oct 12 '19 at 08:06

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I cross posted here and it turns out that there is no such thing as a multi-tenant tenant.

Kirsten
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