title: Not able to set same name for Azure key Vault in different Subscription
body: <p>I am trying to set same name to all my Key Vault in different Subscription but getting below error.</p>
  
  <pre><code>New-AzureRmKeyVault : VaultAlreadyExists: The name 'AKeyVault' is already in use.
  At line:1 char:1
  + New-AzureRmKeyVault -VaultName AKeyVault -ResourceGroupName PS ...
  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  + CategoryInfo          : CloseError: (:) [New-AzureRmKeyVault], CloudException
  + FullyQualifiedErrorId : Microsoft.Azure.Commands.KeyVault.NewAzureKeyVault
  </code></pre>
  
  <p>can someone please let me know if key vault name should be unique across all subscriptions?</p>