单项选择题 You have an Exchange organization named Contoso， Ltd.All servers in the organization have Exchange Server 2010 Service Pack 1 （SP1） installed.The organization contains an Edge Transport server.  Users from a company named Fabrikam， Inc.send e-mail messages over the Internet by using the fabnkam.come-mail address suffix. Contoso acquires Fabrikam. You need to ensure that messages sent from Fabrikam users to Contoso users have the contoso.com e-mail address suffix in their source address.  What should you create？（）

单项选择题 You have an Exchange Server 2010 organization named contoso.com.Your company acquires a company named Fabrikam， Inc. You plan to create new mailboxes for each user from Fabrikam.You need to ensure that each new mailbox can receive e-mail messages sent to fabrikam.com.The solution must not prevent the organization from receiving e-mails sent to contoso.com. What should you do？（）

单项选择题 You have an Exchange Server 2010 organization.Your network contains internal DNS servers.You need to ensure that the Hub Transport servers use external DNS servers when they resolve Internet names. What should you modify？（）