A subscription is an object that defines a tenant's access to a plan and is used to identify the tenant's resources and access across the cloud. A subscription is created when tenants sign up for any plan or add-on.
A subscription is one-to-one mapping between tenant user and plan access. One subscription can be attached to only one plan, whereas single tenants can have multiple subscriptions. Windows Azure Pack provides self-services access to tenants for creating and managing subscriptions as defined by cloud administrators. In this topic, you will learn about subscription management from a cloud administrator's point of view; the tenant's point of view will be covered in the next chapter.