Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
Microsoft Edge will apply Enhanced Security Mode on Intranet zone sites by default. This may lead to Intranet zone sites acting in an unexpected manner. If you enable this policy, Microsoft Edge won't apply Enhanced Security Mode on Intranet zone sites. If you disable or don't configure this policy, Microsoft Edge will apply Enhanced Security Mode on Intranet zone sites. For detailed information about Enhanced Security Mode, see https://go.microsoft.com/fwlink/?linkid=2185895