Pros and Cons of Single Tenant vs Multiple Tenants in Office 365

I recently was involved in a scenario with a customer that had to choose between having multiple Office 365 tenants or just a single tenant. This post will talk about some of the technical considerations that you will have to ask yourself if you are considering choosing between a single or a multi-tenant approach and the impacts that this decision has on the end user experience.

The decision of going with multiple tenants for your organization should not be taken lightly since it has a LOT of implications for the end user experience. I will discuss the end user experience implications in a greater detail below but let me be clear: you should choose to use a single Office 365 tenant for your organization if you can.

There are a few scenarios that organizations may feel that the best or even the only option is to go with multiple tenants. Here are some of the most common scenarios:

In Office 365, users will authenticate to every workload using their identity, typically in one of the following scenarios:

If you need to sync your local Azure Active Directory with Azure Active Directory, there are a few considerations you have to take into account:

If you are in a case where there are already several tenants in your organization and you want to migrate users and Office 365 workloads into a single tenant, it is important to evaluate which workloads are already being used. The easiest migration path is if the only workload in use is email and the more workloads in use, the harder the migration will be.

If you still evaluating if you are going for a single tenant or multiple tenants, read on.

One of the most important things to consider before deciding between a single or multiple tenants is the end user experience. Next, I will discuss in greater detail, what the end user experience will be like in each of the two scenarios.

Happy SharePointing!

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