Your company has an Active Directory Domain Services ( AD DS) domain. All servers run Windows Server 2008 R2.
You are deploying your first Remote Desktop Services (RDS) server. You install a Remote Desktop Session Host (RD Session Host) server in the environment.
You need to install Remote Desktop Services cli ent access licenses (RDS CALs).
What should you do first?（）

Your company has an Active Directory Domain Services (AD DS) domain. All servers run Wind ows Server 2008 R2. All client computers run Windows 7. You have a Remote Desktop Session Host (RD Session Host) server and a Remote Desktop Gateway (RD Gateway) server.
You use Windows Firewall on your servers.
You need to ensure that users can connect to their virtual desktops.
What should you do？（）