title: The Image type for a Virtual Machine Scale Set may not be changed
body: <p>I already have a VMSS provisioned with a base setup of Centos OS on linux. I created an image with my custom image setup (software, applications,etc) and I am run ARM script to update the VMSS, however it fails with  </p>
  
  <pre><code>"error": {
  "code": "OperationNotAllowed",
  "message": "The Image type for a Virtual Machine Scale Set may not be changed."
  </code></pre>
  
  <p>}</p>
  
  <p>Is it possible to update the image without deleting the VMSS and recreating?</p>