In this chapter, we covered the most important and commonly used features and functions of Exchange Online. As you can see, Exchange Online is a complex enough topic that it could support a book all on its own, but we've at least touched on each of the topics, and drilled down into details of the most important ones.

The most important functions within Exchange Online are recipients and mail flow. These are also two of the most complex topics, with many subtopics. Every company that uses Exchange Online should have someone on the staff who has a good understanding of how to use these features.

Almost everything that can be done in the Exchange Online's browser interface can also be done in the Exchange Management Shell inside PowerShell, and many tasks can only be performed that way. An administrator who's going to be making heavy use of Exchange would be well served by practicing their PowerShell skills. Good use of scripting can make tasks that would be arduous and lengthy much shorter...