title: What is Write Back?
body: <p>When I process a cube in SSMS and script to XMLA, I notice the following element:</p>
  
  <pre><code>&lt;WriteBackTableCreation&gt;UseExisting&lt;/WriteBackTableCreation&gt;
  </code></pre>
  
  <p>What is the writeback table creation feature, and what does it mean for SSAS to <code>UseExisting</code>?</p>