IISRootFolder
The installer sets this variable to the full path of the Internet Information Server's (IIS) root folder on the target system. This folder contains the virtual web and FTP folders managed by the server. To obtain the virtual web root folder, use the WWWRootFolder variable.
Usage
You can refer to this variable as <IISRootFolder>. Do not change its value; it has been carefully configured for cross-platform compatibility.