Computer Configuration > Administrative Templates > Microsoft Edge > Startup, home page and new tab page
Both
HKLM\Software\Policies\Microsoft\Edge
This policy applies for Microsoft Edge to all profile types, namely unsigned local user profiles, profiles signed in using a Microsoft Account, profiles signed in using Active Directory and profiles signed in using Microsoft Entra ID. The Enterprise new tab page for profiles signed in using Microsoft Entra ID can be configured in the M365 admin portal, but this policy setting takes precedence, so any M365 admin portal configurations will be ignored. If you enable or don't configure this policy, Microsoft Edge displays Microsoft content on the new tab page. The user can choose different display options for the content. These options include, but aren't limited to: Content off, Content visible on scroll, Headings only, and Content visible. Enabling this policy doesn't force content to be visible - the user can keep setting their own preferred content position. If you disable this policy, Microsoft Edge doesn't display Microsoft content on the new tab page, the Content control in the NTP settings flyout is disabled and set to "Content off", and the Layout control in the NTP settings flyout is disabled and set to "Custom". Related policies: 'NewTabPageAllowedBackgroundTypes' (Configure the background types allowed for the new tab page layout), 'NewTabPageQuickLinksEnabled' (Allow quick links on the new tab page)