单项选择题 You have an Exchange Server 2010 organization.  Your company has a relationship with another company.  The partner company has an Exchange Server 2010 organization.  You need to recommend a security solution to meet the following requirements：  .Ensure that all e-mail delivery between your servers and the partner companys servers is encrypted .Ensure that all communication between your servers and the partner companys servers is authenticated What should you include in the solution？（）

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.  Company policy states that a copy of a users mailbox must be kept for one year after the user leaves thecompany.  All user accounts are in an organizational unit （OU） named OU1.  A compliance administrator plans to export the mailboxes to personal folders.  You need to recommend a solution that allows the compliance administrator to meet the requirements ofthe company policy.  What should you include in the solution？（）