Computer Configuration > Administrative Templates > Microsoft Edge > SmartScreen settings
Both
HKLM\Software\Policies\Microsoft\Edge
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 107. This policy doesn't work because it was only intended to be a short-term mechanism to support the update to a new SmartScreen client. Allows the Microsoft Edge browser to load the new SmartScreen library (libSmartScreenN) for any SmartScreen checks on site URLs or application downloads. If you enable or don't configure this policy, Microsoft Edge will use the new SmartScreen library (libSmartScreenN). If you disable this policy, Microsoft Edge will use the old SmartScreen library (libSmartScreen). Before Microsoft Edge version 103, if you don't configure this policy, Microsoft Edge will use the old SmartScreen library (libSmartScreen). This policy is only available on Windows instances that are joined to a Microsoft Active Directory domain, Windows 10 Pro or Enterprise instances that enrolled for device management. This also includes macOS instances that are that are managed via MDM or joined to a domain via MCX.