You install a new&#8

You install a new Exchange Server 2010 server.You need to ensure that users can connect from the Internet to the server by using Exchange ActiveSync.What should you do on the Exchange server？（）

• AModify the internal URL for the Microsoft-Server-ActiveSync virtual directory.
• BModify the external URL for the Microsoft-Server-ActiveSync virtual directory.
• CEnable Anonymous Authentication for the Microsoft-Server-ActiveSync virtual directory.
• DEnable Windows Integrated Authentication for the Microsoft-Server-ActiveSync virtual directory.