This policy setting can prevent users from customizing both the Quick Access Toolbar and Ribbon through the user interface ...

This policy setting can prevent users from customizing both the Quick Access Toolbar and Ribbon through the user interface (UI).If you enable this policy setting, the following UI entry points are turned off: the Quick Access Toolbar and Ribbon tabs in the application's Office Center dialog box, and the Quick Access Toolbar and Ribbon customization options on the right-click menu on the Ribbon.If you disable or do not configure this policy setting, users can customize the Quick Access Toolbar and Ribbon through both the application's Office Center dialog box, and the right-click menu on the Ribbon.

This policy setting allows you turn off the file validation feature.If you enable this policy setting, file validation will ... This policy setting automatically links tasks when you cut, move, or insert them.If you enable this policy setting, tasks ... This policy setting blocks all add-ins that are not managed by the "List of managed add-ins" policy setting.If you enable ... This policy setting can be used to specify a list of trusted add-ins that can be run without being restricted by the security ... This policy setting can prevent users from customizing both the Quick Access Toolbar and Ribbon through the user interface ... This policy setting can prevent users from making any Quick Access Toolbar and the Ribbon customizations. This includes customizations ... This policy setting changes the destination URL of the Learn more about SharePoint hyperlink located on the Save to SharePoint ... This policy setting configures connection options for Outlook Anywhere. If you enable this policy setting, you can configure ... This policy setting configures Office Telemetry Agent to disguise, or obfuscate, certain file properties that are reported ...