Updated in March 2021. "Office 365 from Scratch" is an introduction to apps included in the Microsoft 365 / Office 365 Enterprise and Business subscriptions and an overview over how these apps integrate. After a presentation of the platform, I describe the most important parts, Exchange, Office, SharePoint and Microsoft 365 Groups. Other chapters introduce Delve, OneDrive, Stream, Teams, Planner, Yammer, Sway and the Power Platform. "Office 365 from Scratch" is primarily intended for administrators and other power users, so admin control is an important part of the book, but I hope that it will be useful for everyone who wants to learn about the possibilities given with their Microsoft 365/ Office 365 account. Peter Kalmström