AAD multi-tenancy is ideal for medium-to-large enterprises who own and manage their own identity infrastructure. This sample is for small enterprises, usually without their own identity infrastructure. It provides support for an application that needs to group it's users into discrete groups, each representing an application tenant.
Premier Dev Consultant Marius Rochon shares an example of a PowerShell script to upload a set of B2C IEF policies to one or more B2C tenants.
Microservices is an architectural style that structures an application as a collection of loosely coupled services, which implement business capabilities. The microservice architecture enables the continuous delivery/deployment of large, complex applications. It also enables an organization to evolve its technology stack.