You have 500 users with Office 365 E1 licenses using Windows 10 multi-session hosts to stream a custom remote app (App1). Which license minimizes cost while allowing users to stream App1?

The correct answer is Windows 10 Enterprise E3. This license is specifically designed for virtual desktop infrastructure (VDI) scenarios, including Azure Virtual Desktop (AVD), and allows users to access Windows 10 multi-session hosts. Since the users already have Office 365 E1, which provides basic Office apps and services, the Windows 10 Enterprise E3 license fulfills the operating system licensing requirement for AVD multi-session hosts at a lower cost than more comprehensive suites. Microsoft 365 E5 is incorrect because it includes many features (like advanced security and compliance) that are not strictly necessary for this scenario, making it more expensive. Office 365 E3 is incorrect as it is an Office suite license and does not cover the Windows operating system licensing required for AVD hosts. An RDS CAL is incorrect because AVD uses a different licensing model that integrates with Microsoft 365 or Windows Enterprise licenses, not traditional RDS CALs.