GPO PreventSmartScreenPromptOverrideForFiles

re_bl Hi!  I just took a look at our policy documentation.  Have you tried to use the 

SmartScreenAllowListDomains Policy?  (https://docs.microsoft.com/en-us/deployedge/microsoft-edge-policies#smartscreenallowlistdomains)

It mentions "Configure the list of Microsoft Defender SmartScreen trusted domains. This means: Microsoft Defender SmartScreen won't check for potentially malicious resources like phishing software and other malware if the source URLs match these domains. The Microsoft Defender SmartScreen download protection service won't check downloads hosted on these domains."  

Thanks! 

-Kelly