Appeon Server for almost all types including .NET, JBoss, JEUS, WebLogic and WebSphere (except for EAServer and NetWeaver) can be installed in a silent mode. And the Appeon Server silent installer not just install Appeon Server, but also install the packaged Appeon applications.
If an older version of Appeon Server has already been installed such as 6.5, 6.6, 2013, or 2013 R2, silent installer will upgrade the older version to the current version; if the exact same build and version of Appeon Server has already been installed, then silent installer will remove the Appeon Server first and then install it again; if the same version (but a different build) of Appeon Server has already been installed, then silent installer will terminate the installation.