单项选择题 You have an Exchange Server 2010 organization named contoso.com.  The organization contains two Client Access servers named CAS1 and CAS2 that are in a Client Accessserver array.  All internal and external users connect to their mailboxes by using mail.contoso.com.  You need to install a certificate on the Client Access servers to meet the following requirements：.Support 500 client computers that are not joined to the Active Directory domain  .Support clients that use Microsoft Office Outlook in Cached Exchange Mode， Autodiscover， andExchange ActiveSync .Minimize client and user support costs What should you do？（）

单项选择题 You have an Exchange Server 2010 organization. Your company’s compliance policy states the following： .Delete e-mail messages sent to legal department users that are older than 180 days. .Delete e-mail messages sent to all other users that are older than 60 days  You need to recommend a solution that meets the requirements of the compliance policy.  What should you recommend？（）

单项选择题 You have an Exchange Server 2010 organization.  All users access their mailboxes by using Outlook Web App （OWA）.  You need to plan a solution to reduce the number of e-mail messages that are accidentally sent to distribution groups that contain company executives.  What should you include in the plan？（）