YouhaveanActiveDirectorydomainnamedcontoso.com.YouhaveanExchangeServer2010organizationthatcontainsaClientAccessservernamedCAS1.UsersconnecttoCAS1fromtheInternetbyusingmail.contoso.com.Theorganizationcontainsthefollowingmobileclients：（1）WindowsMobile5.0（2）
题目
YouhaveanActiveDirectorydomainnamedcontoso.com.YouhaveanExchangeServer2010organizationthatcontainsaClientAccessservernamedCAS1.UsersconnecttoCAS1fromtheInternetbyusingmail.contoso.com.Theorganizationcontainsthefollowingmobileclients：（1）WindowsMobile5.0（2）WindowsMobile6.1（3）WindowsMobile6.5YouplantoinstallacertificateonCAS1.YouneedtoensurethatallclientscanconnecttoCAS1fromtheInternetbyusingExchangeActiveSync.Whichnameshouldyouincludeinthecertificate？（）
A.contoso.com
B.CAS1.contoso.com
C.EAS.contoso.com
D.mail.contoso.com