Setting it up is not a walk in the sun (and there is a minor irritant), but the attached document shows and explains a method to do this with mapped content controls and a customXMLPart event monitor.
If anyone looks at this, I would be interested if any other approach to resolve Microsoft's negligence in resolving the long standing issues with the events. There is no (known) logical explanation why the DocumentCCExit event does not fire when when a user moves the mouse from a CC to check or uncheck another CC.
Cross posted:
https://www.msofficeforums.com/word-...omxmlpart.html