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 YouhaveanExchangeServer2010organizationnamedcontoso.com.TheorganizationcontainstwoClientAccessserversnamedCAS1andCAS2thatareinaClientAccessserverarray.Allinternalandexternalusersconnecttotheirmailboxesbyusingmail.contoso.com.YouneedtoinstallacertificateontheClientAccessserverstomeetthefollowingrequirements：.Support500clientcomputersthatarenotjoinedtotheActiveDirectorydomain.SupportclientsthatuseMicrosoftOfficeOutlookinCachedExchangeMode，Autodiscover，andExchangeActiveSync.MinimizeclientandusersupportcostsWhatshouldyoudo？（）

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 the company.  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？（）