You have an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. All client computers run Windows 7.All client computers are configured to extend the desktop display across two monitors.
You have a Remote Desktop Session Host (RD Session Host) server.
You need to ensure that users can extend the Remote Desktop Connection window across both monitors.
What should you do?（）

Your company has an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. All client computers run Windows 7. You run Remote Desktop Services and Microsoft Virtual Desktop Infrastructure (VDI). You have the servers shown in the following table. 
Name  Server role
Server1  RD Session Host
Server2  RD Virtualization Host
Server3  RD Connection Broker
Server4  RD Web Access
You are configuring Remote Desktop Web Access (RD Web Access) to publish VDI desktops and remote applications on the RD Web Access server.
You need to ensure that when remote users log on to the RD Web Access server they are presented with all remote applications and only their assigned VDI desktop.
Which two actions should you perform on Server4？（）