You can use these Command IDs for programming but also to disable buttons in the Ribbon, Backstage and other menus and toolbars by means of Group Policies.
Download: Command ID overview Outlook 2003 (English)
Download: 2007 Office System Document: Lists of Control IDs
Download: Office 2010 Help Files: Office Fluent User Interface Control Identifiers
Download: Office 2013 Help Files: Office Fluent User Interface Control Identifiers
Download: Office 2016 Help Files: Office Fluent User Interface Control Identifiers
View: Office Fluent UI Command Identifiers for Office 2013, 2016, 2019 and 365 on GitHub
