anchor.diff:  
     This error indicates that unknown VM (to the Director) took up the IP that the Director is trying to assign to a new VM. Either let the Director know to not use this IP by including it in the reserved section of a subnet in your manual network, or make that IP available by terminating the unknown VM.
   
  -1. Limits of Premium Storage blob snapshots
  +* Limits of Premium Storage blob snapshots
   
     ```
     Error 100: Unknown CPI error 'Unknown' with message 'SnaphotOperationRateExceeded (409): The rate of snapshot blob calls is exceeded.
  
positive.code: 
    Either upgrade your trial account, or file a support ticket in the Azure portal to raise account quotas.
  
  1. NicInUse
  
    ```
    http_delete - error: 400 message: {
  
negative.code: ---
  ## <a id="errors"></a> Errors
  
  * Invalid service principal
  
    ```
    http_get_response - get_token - http error: 400
  