This policy setting can prevent users from making any Quick Access Toolbar and the Ribbon customizations. This includes customizations ...

This policy setting can prevent users from making any Quick Access Toolbar and the Ribbon customizations.  This includes customizations made through user interface (UI) entry points, or loaded from documents or templates.If you enable this policy setting, users will not be able to customize the Quick Access Toolbar and Ribbon through either the Quick Access Toolbar and Ribbon tabs in the application's Office Center dialog box, or the right-click menu on the Ribbon.  In addition, Quick Access Toolbar and Ribbon customizations originating from documents or templates will not be loaded when these documents are opened.If you disable or do not configure this policy setting, users can make Quick Access Toolbar and Ribbon customizations through the UI, as well as load them from documents and templates.