How many years of experience do yo u have with deploying and maintaining a virtualization infrastructure using Microsoft desktop or server virtualization technologies?（）

Your company has an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. You activate the Key Management Service (KMS) on a server to handle volume activation for your Windows 7 clien t computers.
Windows 7 client computers are not being activated. The KMS licensing status is shown as Licensed. The Windows Event Log does not contain any corresponding activation - related events.
You need to ensure that the KMS server can activate Windows  7 client computers.
What should you do?（）