An unattended installation (also called silent installation) is one which does not require user interaction. Sometimes an unattended installation is silent installation when it does not display any indication of status or progress. Most of the people use one or the other name to refer to automatic deployments.
On XenApp 6, we can use two different commands to set up the server in unattended mode:
XenAppSetupConsole.exe: Used to install XenApp components.
XenAppConfigConsole.exe: Used to configure XenApp, join server to a farm, configure authentication, and so on.
We can use the following unattended install instructions to automatize the deployment of both physical and virtual XenApp servers.