Your network contains an Active Directory domain named contoso.com.
Your company hires 500 temporary employees for the summer.
The human resources department gives you a Microsoft Excel document that contains a list of the temporary employees.
You need to automate the creation of user accounts for the 500 temporary employees.
Which tool should you use?（）

Your network contains an Active Directory domain named contoso.com. The domain contains hundreds of groups, many of which are nested in other groups.
The domain contains a user account named user1.User1 is a direct member of 15 groups.
You need to identify of which Active Directory groups User1 is a member, including the nested groups. The solution must minimize administrative effort.
Which tool should you use?（）