Update storage-auth-aad-script.md

Author: tamram

articles/storage/common/storage-auth-aad-script.md

@@ -5,7 +5,7 @@ services: storage
 author: tamram
 ms.service: storage
 ms.topic: article
-ms.date: 05/30/2018
+ms.date: 08/29/2018
 ms.author: tamram
 ms.component: common
 ---
@@ -61,7 +61,7 @@ To use Azure PowerShell to sign in with an Azure AD identity:
 1. Make sure that you have the latest version of PowerShellGet installed. Run the following command to install the latest:
 
     ```powershell
-    Install-Module PowerShellGet –Repository PSGallery –Force
+    Install-Module -Name Azure.Storage -AllowPrerelease –AllowClobber -RequiredVersion "4.4.1-preview"
     ```
 
 2. Uninstall any previous installations of Azure PowerShell.