单项选择题 Your network contains a single Active Directory domain.  You have an Exchange Server 2010 organization that contains a Hub Transport server named Hub1. Hub1 receives all e-mail messages that are sent to your organization from the Internet.  A new company security policy states that domain-joined servers must not be accessible directly from theInternet.  You need to create a message hygiene solution to meet the following requirements： .Comply with the new security policy .Minimize the amount of spam that is delivered to the internal Exchange servers in the organization What should you do first？（）

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？（）

单项选择题 Your network contains two Exchange Server 2010 Edge Transport servers.  The network also contains five Hub Transport servers in two Active Directory sites. All e-mail sent to the network is received by the Edge Transport servers. You plan to configure anti-spam filtering.  You need to ensure that the anti-spam filtering configurations are applied to both Edge Transport servers. The solution must use a minimum amount of administrative effort.  What should you do？（）