This book is designed for readers who have a fundamental understanding of Office 365 services, but might not have technical expertise in the administration and configuration of the on-premises technologies equivalent to those services such as Exchange, SharePoint, Office, and Skype for Business. Office 365 has various technologies, and this book assumes that the audience for each of these technologies has the relevant expertise to administer and change some configurations on those workloads. This book includes information that can serve multiple audiences and roles, such as information on how to implement the fundamental workloads in areas such as migration plan, identity plan, network assessments, and security. The audience must have some operational expertise for managing AD, running network assessments, and making configuration changes such as Domain Name System (DNS), proxies, and firewalls. Is not required but is advised in all implementations to have a separate environment to test in lab and to implement the topics covered in this book.