Policy
Intranet Sites: Include all sites that bypass the proxy server
This policy setting controls whether sites which bypass the proxy server are mapped into the local Intranet security zone. If you enable this policy setting, sites which bypass the proxy server are mapped into the Intranet Zone. If you disable this policy setting, sites which bypass the proxy server aren't necessarily mapped into the Intranet Zone (other rules might map one there). If you do not configure this policy setting, users choose whether sites which bypass the proxy server are mapped into the Intranet Zone.
eb458119352a IZ_ProxyByPass Registry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyByPass (enabled) = 1
HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyByPass (disabled) = 0HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyByPass (enabled) = 1
HKCU\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyByPass (disabled) = 0Policy notes
This policy setting controls whether sites which bypass the proxy server are mapped into the local Intranet security zone. If you enable this policy setting, sites which bypass the proxy server are mapped into the Intranet Zone. If you disable this policy setting, sites which bypass the proxy server aren't necessarily mapped into the Intranet Zone (other rules might map one there). If you do not configure this policy setting, users choose whether sites which bypass the proxy server are mapped into the Intranet Zone.