title: Terraform back-end to azure blob storage errors
body: <p>I have been using the below to successfully create a back-end state file for terraform in Azure storage, but for some reason its stopped working. I've recycled passwords for the storage, trying both keys and get the same error every-time </p>
  
  <p><strong>backend.tf</strong></p>
  
  <pre><code>    terraform {
      backend "azurerm" {
          storage_account_name    = "terraformstorage"
          resource_group_name     = "automation"
          container_name          = "terraform" 
          key                     = "testautomation.terraform.tfstate"
          access_key              = "&lt;storage key&gt;"
      }
  }
  </code></pre>
  
  <p><strong>Error returned</strong></p>
  
  <blockquote>
    <p>terraform init<br/>
        Initializing the backend...<br/>
        Successfully configured the backend "azurerm"! Terraform will automatically
        use this backend unless the backend configuration changes.<br/>
        Error refreshing state: storage: service returned error: StatusCode=403, ErrorCode=AuthenticationFailed, ErrorMessage=Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.
        RequestId:665e0067-b01e-007a-6084-97da67000000<br/>
        Time:2018-12-19T10:18:18.7148241Z, RequestInitiated=Wed, 19 Dec 2018 10:18:18 GMT, RequestId=665e0067-b01e-007a-6084-97da67000000, API Version=, QueryParameterName=, QueryParameterValue=<br/></p>
  </blockquote>
  
  <p>Any ideas what im doing wrong? </p>