单项选择题 You have an Exchange Server 2010 organization named Contoso.com.All users from your company have the @contoso.com email address suffix.You need to configure a public folder named Folder1 so that Internet users can post content by sending an e-mail to folder1@contoso.com. What should you do？（）

单项选择题 You have an Exchange Server 2010 organization.You have a group named Group1 that contains 10，000 members.You need to ensure that an informative message is displayed when users add Group1 to the recipient list of an e-mail message. What should you do？（）

单项选择题 You have an Exchange Server 2010 organization.The organization contains a distribution group named Group1.You need to ensure that a user named User1 can review and approve all messages sent to Group1.You must prevent User1 from modifying the membership of Group1.  What should you do？（）