Windows Essentials Experience

Windows Essentials is a lightweight integration between Office 365 and Windows AD. It was originally envisioned as a solution for organizations of 50 people or less, and it first became available in Windows 2012 R2 as a replacement for Small Business Server. However, customer demand soon caused Microsoft to open this up to users of later editions of Windows Server, and it can now be added as a server role in Standard, Enterprise, and Data Center editions.