Your network contains four servers that run Windows Server 2008 R2.
The servers are configured as shown in the following table:

Server2 and Server3 are configured as RemoteApp sources on Server4.
You need to ensure that the RemoteApp programs are listed on the RD Web Access Web page on Server1.
What should you do?

A.
On Server4, add Server1 to the Session Broker Computers group.

B.
On Server4, add Server1 to the TS Web Access Computers group.

C.
On Server1, add Server4 to the TS Web Access Administrators group.

D.
On Server1, add Server2 and Server3 to the TS Web Access Administrators group.

Explanation:

Populate the TS Web Access Computers Security Group
If the RD Web Access server and the Remote Desktop Session Host (RD Session Host) server that hosts the RemoteApp programs are separate servers, you must add the computer account of the RD Web Access server to the TS Web Access Computers security group on the RD Session Host server.

To add the computer account of the RD Web Access server to the security group
On the RD Session Host server, click Start, point to Administrative Tools, and then click Computer Management.
In the left pane, expand Local Users and Groups, and then click Groups.
In the right pane, double-click TS Web Access Computers.
In the TS Web Access Computers Properties dialog box, click Add.
In the Select Users, Computers, or Groups dialog box, click Object Types.
In the Object Types dialog box, select the Computers check box, and then click OK.
In the Enter the object names to select box, specify the computer account of the RD Web Access server, and then click OK.
Click OK to close the TS Web Access Computers Properties dialog box.

Source: http://technet.microsoft.com/en-us/library/cc771623.aspx