Computer Configuration > Administrative Templates > Microsoft Edge > Identity and sign-in
Both
HKLM\Software\Policies\Microsoft\Edge
This policy controls the proactive authentication in Microsoft Edge, that connects the signed-in user identity with Microsoft Bing, MSN and Copilot services for a smooth and consistent sign-in experience. If you enable or don't configure this policy, Microsoft Edge authentication requests are automatically sent to the services using the account that is signed-in to the browser. If you disable this policy, Microsoft Edge does not send authentications requests to these services and users will need to manually sign-in.