Azure Core

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Azure is composed of a number of different logical elements that have a container-contained relationship.
- There is Azure AD, which is the top-level construct known as the tenant.
- There are management groups that are contained in the tenant and can contain one or more subscriptions.
  - There is always the built-in root management group, but others can be created to create a hierarchy of management groups that can be six levels deep.'
- Subscriptions are a billing unit.
- Within subscriptions there can be one or more resource groups, which in turn contain the individual resources, like virtual machines.
Resource Groups are logical collections of resources that share the same lifecycle. They can also serve as a scope for permissions.