单项选择题 Your network contains one Exchange Server 2010 Client Access server named Server1.You have a user named User1.You need to limit the size of the attachments that User1 can download by using Exchange ActiveSync.The solution must not affect other users. What should you do first？（）

单项选择题 YouinstallanewExchangeServer2010server.YouneedtoensurethatuserscanconnectfromtheInternettotheserverbyusingExchangeActiveSync.WhatshouldyoudoontheExchangeserver？（）

单项选择题 Your network contains an Exchange Server 2010 server.You need to prevent a user named User1 from downloading attachments larger than 50 KB when using Exchange ActiveSync.Your solution must not affect other users.  What should you do first？（）