title: How to disable the "Save As" tab in Word 2016
body: <p>I have a VSTO add-in that I developed for Word 2010 and I'm currently in the process of upgrading to Office 2016. One of the things I do is, in the ribbon xml, disable the save as command (&lt;command idMso="FileSaveAs" getEnabled="IsFileSaveAsEnabled" ...&gt;) with certain documents. However, it appears that Microsoft have added a new Save As tab to the backstage view in Word 2016 that I can't dynamically disable. </p>
  
  <p>The disabling of the save as command effects the Save As button if it's added to the quick access toolbar, but it does not effect the tab on the back stage view. I've tried changing other things on this tab and it appears to ignore any changes I attempt to make.</p>
  
  <p>I'm developing in VS 2017 and automatically migrated the project to Office 2016.</p>
  
  <p>If I add </p>
  
  <pre><code>&lt;backstage&gt;
      ...
      &lt;tab idMso="TabSave" getEnabled="IsFileSaveEnabled" /&gt;
      ...
  &lt;/backstage&gt;
  </code></pre>
  
  <p>to my ribbon.xml the IsFileSaveEnabled isn't invoked.</p>
  
  <pre><code>public bool IsFileSaveEnabled(IRibbonControl control) 
  {
      return false; // Not the actual implementation, but you get the idea.
  }
  </code></pre>
  
  <p>In fact even setting the enabled attribute to false does nothing, however this</p>
  
  <pre><code>&lt;backstage&gt;
      ...
      &lt;tab idMso="TabSave" visible="false" /&gt;
      ...
  &lt;/backstage&gt;
  </code></pre>
  
  <p>does actually hide the tab. Though this is no good because this will happen for all documents, but I want it to be conditional.</p>
  
  <p>So is it just not possible to disable this tab the way I want to or is there something new I need to do? I can't really find anything else on the web about this.</p>