Computer Configuration > Administrative Templates > Microsoft Edge > Content settings
Both
HKLM\Software\Policies\Microsoft\Edge
Control whether websites can create cookies on the user's device. This policy is all or nothing - you can let all websites create cookies, or no websites create cookies. You can't use this policy to enable cookies from specific websites. Set the policy to 'SessionOnly' to clear cookies when the session closes. If you don't configure this policy, the default 'AllowCookies' is used, and users can change this setting in Microsoft Edge Settings. (If you don't want users to be able to change this setting, set the policy.) Policy options mapping: * AllowCookies (1) = Let all sites create cookies * BlockCookies (2) = Don't let any site create cookies * SessionOnly (4) = Keep cookies for the duration of the session, except ones listed in 'SaveCookiesOnExit' (Save cookies when Microsoft Edge closes) Use the preceding information when configuring this policy.