单项选择题 You have an Exchange Server 2010 organization.Users report that they can share free/busy information with users at a federated partner， but they cannot share contacts with those users. You need to ensure that your users can share contacts with users at the federated partner.  What should you modify？（）

单项选择题 YouhaveanExchangeServer2010organization.YouneedtoensurethatausernamedUser1canaccesshismailboxbyusingonlyOutlookWebApp.Whatshouldyoudo？（）

单项选择题 You have an Active Directory forest named contoso.com.You install a new Exchange Server 2010 organization that contains a Client Access server named CAS1.You need to configure certificates in the organization to support the following client connections：  （1）Autodiscover  （2）Outlook Anywhere  （3）Exchange ActiveSync  What should you do？（）