Windows 10 Enterprise E3 in CSP is a new offering that delivers, by subscription, exclusive features reserved for Windows 10 Enterprise edition. This offering is available through the Cloud Solution Provider (CSP) channel via the Partner Center as an online service. Windows 10 Enterprise E3 in CSP provides a flexible, per-user subscription for small- and medium-sized organizations (from one to hundreds of users).
To take advantage of this offering, you must have the following:
Windows 10 Pro, version 1607 (also known as Windows 10 Anniversary Update) or later installed on the devices to be upgraded
Azure Active Directory (Azure AD) available for identity management