title: What does it mean if I reimage an Azure VM scale set?
body: <p>I have a vm scale set deployed using a custom image.
  What will happen if I re-image it? The <a href="https://docs.microsoft.com/en-us/rest/api/compute/virtualmachinescalesets/reimage" rel="nofollow noreferrer">docs</a> aren't very helpful here.</p>
  
  <p>How does it differ from deleting and redeploying via ARM?</p>