Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
In some environments, the Windows OS client can't connect to the Windows Push Notification Service (WNS). For these environments, you can use the Microsoft Edge built-in WNS push client, which may be able to connect successfully. If enabled, Microsoft Edge will use its built-in WNS push client to connect to WNS. If disabled or not configured, Microsoft Edge will use the Windows OS client to connect to the Windows Push Notification Service. This is the default setting.