title: How to add a group to a (VBA) custom ribbon without xmlns/idQ?
body: <p><strong>Situation:</strong></p>
  
  <ul>
  <li>Users have an existing custom ribbon that is added via a .PPAM (combination of VBA macros and Ribbon customization XML).</li>
  <li>We want to add a group to that custom ribbon via our managed COM add-in</li>
  <li>For custom ribbons from other managed COM add-ins this is feasible via the xmlns:foo="bar" &amp; idQ that can be extracted from the customUI <a href="https://stackoverflow.com/questions/3052229/add-a-custom-ribbon-group-to-an-existing-custom-ribbon-group-in-word-2007">Link</a></li>
  </ul>
  
  <p><strong>Complication:</strong></p>
  
  <ul>
  <li>Custom Ribbons from non-managed add-ins seem to have no xmlns namespace, they do not show up in the customUI</li>
  <li>Even via PowerPoint/Office the user can not customize those ribbons.</li>
  </ul>
  
  <p>Any idea how we could achieve adding buttons?</p>
  
  <p>We can request changes to the non-managed/VBA add-in.</p>