Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
Launches Renderer processes into an App Container for additional security benefits. If you don't configure this policy, Microsoft Edge will launch the renderer process in an app container in a future update. If you enable this policy, Microsoft Edge will launch the renderer process in an app container. If you disable this policy, Microsoft Edge will not launch the renderer process in an app container. Only turn off the policy if there are compatibility issues with third-party software that must run inside Microsoft Edge's renderer processes. This policy will only take effect on Windows 10 RS5 and above.