Your network contains an Active Directory forest. The forest schema contains a custom attribute for  user objects.  
You need to modify the custom attribute value of 500 user accounts.  
Which tool should you use（）

Your network contains an Active Directory forest.  
You set the Windows PowerShell execution policy to allow unsigned scripts on a domain controller in the  network. 
You create a Windows PowerShell script named new-users.ps1 that contains the following lines：  new-aduser user1  new-aduser user2  new-aduser user3  new-aduser user4  new-aduser user5  On the domain controller， you double-click the script and the script runs. You discover that the script fails to create the user accounts.  
You need to ensure that the script creates the user accounts.  
Which cmdlet should you add to the script（）