What is the highest level of organizational structure in Azure?

The highest level of organizational structure in Azure is the subscription. A subscription serves as a container for resources and provides access to Azure services. It encompasses resource groups, individual resources, and roles that govern access permissions. This structure allows for better management of resources, costs, and user access within an Azure environment. Subscriptions can be tied to an organization’s billing account and facilitate resource usage governance across various projects.

In Azure, a Resource Group is a logical container holding related resources for an Azure solution, which operates at a scope lower than the subscription. A Resource represents individual components within a Resource Group and is thus an even more granular level. An AD Tenant, while crucial for identity management and resource access, operates as the overarching directory service that enables identity authentication but is not considered the highest organizational structure when it comes to resource deployment and management options available in the Azure cloud.