title: Azure alerting rule for poison queue count
body: <p>In a pervious project I have managed to setup a Alert rule that looks at poison queue message count and alerts using a webhook into slack when something is in the queue (once per day).</p>
  
  <p>I was trying to find where this exists in Azure as it looks like things have moved around. If this is not a feature provided by azure could you give guidance on what's the best route in implementing something similar.</p>
  
  <p>Thanks</p>