OUs play a crucial role by allowing engineers to create a hierarchical structure within domain boundaries. The hierarchical structure will be created considering object management, delegating control, or applying group policies to manage applications, services, and security settings. In this chapter, you learned why the OU design is important and what needs to be considered when designing the OU structure. After that, we moved on to different OU models that can be used as guidelines to design OU structures. In the end, you learned how to manage OUs in the Active Directory infrastructure and how to delegate control for OUs.

In the next chapter, we will look into group policies, which are one of the core features of Active Directory.