In this chapter, we discussed the new WaaS model for delivering Windows, including the feature updates, quality updates, servicing channels, and deployment rings. Understanding the deployment methodology is important from both the MS-900 exam perspective as well as real-world management one. 

Additionally, we covered some of the features of the Microsoft 365 admin centers, including the various security roles and basic administrator tasks. Finally, we took a tour of the Microsoft 365 end user interface so you can understand how users will see and interact with the service.

In the next chapter, we will discuss some of the differences between Office 2016 and Office 365 ProPlus, as well as how to begin deploying Office.