In this chapter, we learned how to build the second core integration point, Directory Synchronization, to support authentication services, address book synchronization, and the future deployment of Exchange Hybrid with Office 365. We looked at how to filter objects so that only objects that are held in a specified OU get synchronized. Finally, we looked at the sync scheduler and how to change the frequency of the sync process, as well as how to manually start a sync.
In our next chapter, we will focus on the build out of Exchange Hybrid, which is a critical component of our migration to Exchange Online from Exchange on-premises.