Computer Configuration > Administrative Templates > Microsoft Edge > Experimentation
Both
HKLM\Software\Policies\Microsoft\Edge
Configures users ability to override state of feature flags. If you set this policy to 'CommandLineOverridesEnabled', users can override state of feature flags using command line arguments but not edge://flags page. If you set this policy to 'OverridesEnabled', users can override state of feature flags using command line arguments or edge://flags page. If you set this policy to 'OverridesDisabled', users can't override state of feature flags using command line arguments or edge://flags page. If you don't configure this policy, the behavior is the same as the 'OverridesEnabled'. Policy options mapping: * CommandLineOverridesEnabled (2) = Allow users to override feature flags using command line arguments only * OverridesEnabled (1) = Allow users to override feature flags * OverridesDisabled (0) = Prevent users from overriding feature flags Use the preceding information when configuring this policy.