You can enable Parallels Plesk Panel to use either the Internet Information Server (IIS) server or the Apache for Windows Web server to provide Internet access to the Parallels Plesk Panel.
By default, latest Parallels Plesk Panel versions use the IIS Web server to provide access to the Parallels Plesk Panel. However, earlier Parallels Plesk Panel versions used Apache for this purpose. Upgrading Parallels Plesk Panel will not automatically switch the Parallels Plesk Panel to IIS. If you want the Parallels Plesk Panel access to be served by IIS after Parallels Plesk Panel upgrade, you can switch Parallels Plesk Panel to IIS manually. Ability to use different Web servers for providing access to Parallels Plesk Panel gives Parallels Plesk Panel administrators more flexibility in managing Parallels Plesk Panel servers and helps to optimize server performance.
You can change a Web server engine used by Parallels Plesk Panel by using the Changing Web Server Engine feature in Parallels Plesk Panel Reconfigurator.
You can select either Apache for Windows Web Server or IIS Web server to provide access to Parallels Plesk Panel.
To provide access to Parallels Plesk Panel through a different Web server, follow these steps:
%plesk_dir%\admin\bin\ folder (where %plesk_dir% is the Windows' system variable specifying the folder where Parallels Plesk Panel is installed).This folder contains Parallels Plesk Panel command-line utilities. For more information on Parallels Plesk Panel for Windows command-line utilities, see Parallels Plesk Panel Command-Line Interface Reference.
reconfigurator.exe --switch-plesk-web-server --new-provider=apache
reconfigurator.exe --switch-plesk-web-server --new-provider=iis