单项选择题 You have an Exchange 2010 organization.You have an administrative user named Admin1.You need to ensure that Admin1 can move mailboxes in the organization.The solution must assign the minimum amount of permissions to Admin1. What should you do？（）

单项选择题 You have an Exchange Server 2010 organization.You need to use Role Based Access Control （RBAC） to provide a user the ability to manage recipients in a specific organizational unit （OU）.  What should you do first？（）

单项选择题 You have an Exchange Server 2010 organization named contoso.com.Your company is Investigating a user named User1.You need to prevent User1 from permanently deleting the items in his mailbox. What should you run？（）