单项选择题Company.comnetworkconsistsofasingleActiveDirectorydomainnamedCompany.com.Company.comhasanExchangeServer2010organization.TheCompany.comemployeesuseMicrosoftOfficeOutlooktoconnecttotheirmailboxes.ACompany.comemployeenamedRoryAllencomplainsthatheisunabletosendencryptede-mailmessagestoanexternalrecipientclient.Furthermore,bothoftheseusersusee-mailencryptioncertificates.RoryAllenneedstosendencryptede-mailmessagestotheexternalrecipientclient.Whatshouldyoudo?()
A.The best option is to inform Rory Allen to change the sensitivity settings of the e-mail message.
B.The best option is to inform the external recipient client to add a delegate.
C.The best option is to inform the external recipient client to send a signed e-mail message to Rory Allen.
D.The best option is to inform Rory Allen to send a signed e-mail message to the external recipient client.