Your organization has Exchange Server 2010.You need to ensure that users in the organization are notified before they send e-mail messages to external recipients. Which cmdlet should you run？（）

You have an Active Directory forest that contains one domain named contoso.com. The functional level of both the forest and the domain is Windows Server 2003. You have an Exchange Server 2003 organization. All servers have Exchange Server 2003 Service Pack 2 （SP2） installed. You plan to transition to Exchange Server 2010. You need to prepare the Active Directory environment for the deployment of the first Exchange Server 2010 server. 
What should you run（）？ 
 

You plan to deploy Exchange Server 2010 on a new server. The server will be a member of a database availability group. You need to identify the operating system that can be installed on the server to support Exchange Server 2010. Your solution must minimize costs. 
Which operating system should you identify（）？