Users buy retail PCs that run Windows 10 Pro but your company standard is Windows 10 Enterprise. You must upgrade those PCs to Windows 10 Enterprise, join them to Azure AD, and install several Microsoft Store apps while preserving any user-installed applications and minimizing user interaction. Which solution is the best recommendation?

A Windows Configuration Designer provisioning package is the best solution because it allows you to upgrade Windows 10 Pro to Enterprise, join Azure AD, and install Store apps with minimal user interaction, all while preserving existing applications and data. This is achieved by applying a pre-configured package. Windows Autopilot is primarily for new device setup and enrollment, not for in-place upgrades of existing retail PCs with pre-installed user apps. Microsoft Deployment Toolkit (MDT) and Windows Deployment Services (WDS) are imaging solutions that typically reimage the device, which would erase user-installed applications and data, contradicting the requirement to preserve them.