This policy setting allows you to prevent users from using apps for Office.If you enable this policy setting, apps are blocked ...

This policy setting allows you to prevent users from using apps for Office.If you enable this policy setting, apps are blocked and all other policy settings in the Trusted Catalogs folder are ignored.If you disable or do not configure this policy setting, apps are allowed. Other policy settings in the Trusted Catalogs folder determine which specific app sources are allowed.