Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
This policy controls whether users can enable HTTPS-Only Mode (Always Use Secure Connections) in Settings. HTTPS-Only Mode attempts to upgrade all navigations to HTTPS. If this setting isn't set or is set to allowed, users are able to enable HTTPS-Only Mode. If this setting is set to `disallowed`, users can't enable HTTPS-Only Mode. If this setting is set to force_enabled, HTTPS-Only Mode is enabled in Strict mode and users can't disable it. If this setting is set to force_balanced_enabled, HTTPS-Only Mode is enabled in Balanced mode and users can't disable it. If you set this policy to a value that isn't supported by the version of Microsoft Edge that receives the policy, Microsoft Edge defaults to the allowed setting. The separate HttpAllowlist policy can be used to exempt specific hostnames or hostname patterns from being upgraded to HTTPS by this feature. Policy options mapping: * allowed (allowed) = Don't restrict users' HTTPS-Only Mode setting * disallowed (disallowed) = Don't allow users to enable any HTTPS-Only Mode * force_enabled (force_enabled) = Force enable HTTPS-Only Mode in Strict mode * force_balanced_enabled (force_balanced_enabled) = Force enable HTTPS-Only Mode in Balanced Mode Use the preceding information when configuring this policy. Example value: disallowed