Windows 10 Enterprise E5 is a bundle, that includes Windows 10 Enterprise E3 and Windows Defender Advanced Threat Protection (ATP) subscription. In a month after that Windows 10 Enterprise E5 was also added into CSP. End-user with Windows 10 Enterprise E3 license, assigned through CSP, can convert up to five Windows 10 Pro devices to Windows 10 Enterprise by logging in using Azure AD account. On the 1st of September a new item was added to the list of services on Partner Center – Windows 10 Enterprise E3.