Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 139. This policy lets you manage settings for 'AutomaticHttpsDefault' (Configure Automatic HTTPS), which switches connections from HTTP to HTTPS. This feature helps protect against man-in-the-middle attacks by enforcing more secure connections, but users might experience more connection errors. Microsoft Edge attempts to upgrade some navigations from HTTP to HTTPS, when possible. This policy can be used to disable this behavior. If set to "AlwaysUpgrade" or left unset, this feature will be enabled by default. The separate HttpAllowlist policy can be used to exempt specific hostnames or hostname patterns from being upgraded to HTTPS by this feature. This policy is obsolete, and has been replaced with the policy 'HttpsUpgradesEnabled' (Enable automatic HTTPS upgrades). Policy options mapping: * DisableAutomaticHttps (0) = Automatic HTTPS functionality is disabled. * UpgradeCapableDomains (1) = (Deprecated) Navigations delivered over HTTP are switched to HTTPS, only on domains likely to support HTTPS. * AlwaysUpgrade (2) = All navigations delivered over HTTP are switched to HTTPS. Connection errors might occur more often. Use the preceding information when configuring this policy.