title: Problems creating a cluster in ACS
body: <p>I had this error on Saturday when creating an ACS cluster (DC/OS and DS2), I tried putting a different name but it seems that it had conflict with an existing storage account. Attendees of a talk I gave had similar problem(s) and their account was new, could someone provide info about what's needed to in order to avoid these type of problems? It seems that when it's creating the resources needed it's putting a duplicate ID, maybe it get's fixed by just adding as a prefix the cluster name?</p>
  
  <p><a href="https://i.stack.imgur.com/FFtqa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FFtqa.png" alt="enter image description here"></a></p>