With the rising popularity of virtualization, it is time to start thinking about how you secure your virtual environment. During this presentation, best practices for securing a virtual environment based on Microsoft’s Hyper-V are discussed, both from the angle of the Hyper-V host as from the angle of the guests. Further it will be shown how you can use Authorization Manager (AzMan) to provide role-based access control for Hyper-V, separating host administrators from guest administrators and precisely delegating control to them, which will also be shown using System Center Virtual Machine Manager (SC VMM).