Microsoft Learn - Microsoft Edge Enterprise documentation

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Microsoft Learn - Release notes for Microsoft Edge Stable Channel

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To disable the Microsoft search/news page on new tab pages you have to resort to a Edge extension or set a GPO Policy registry key:

 New-ItemProperty -Path "HKCU:\SOFTWARE\Policies\Microsoft\Edge" -Name "NewTabPageLocation" -Value "about:blank" -PropertyType String -Force

Source: Reddit - How do I change the NEW TAB PAGE in Edge?