General availability: Role-Based Access Control
Role-Based Access Control (RBAC) provides fine-grained access management for Azure resources, enabling you to grant users only the rights they need to perform their jobs. Download the generally available RBAC command-line management tools or use the Azure preview portal to manage access to your production workloads. RBAC is provided at no additional cost to all Azure subscribers. For more information, please visit the Active Directory Team Blog.