Prevent bypassing of Microsoft Defender SmartScreen warnings about downloads

This policy lets you determine whether users can override Microsoft Defender SmartScreen warnings about unverified downloads. If you enable this policy, users in your organization can't ignore Microsoft Defender SmartScreen warnings, and they're prevented from completing the unverified downloads. If you disable or don't configure this policy, users can ignore Microsoft Defender SmartScreen warnings and complete unverified downloads. This policy is available only on Windows instances that are joined to a Microsoft Active Directory domain, Windows 10 Pro or Enterprise instances that enrolled for device management, or macOS instances that are that are managed via MDM or joined to a domain via MCX.