EcoStruxure Power Operation (EPO) 2021: How to install the web server (Old ActiveX control)

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Issue
EPO 2021 Installer UI don’t have option to install the Web Server.

Environment
EcoStruxure Power Operation (EPO) 2021

Cause
Since latest version packed with WebHMI so this is unavailable in the installer UI.

Resolution
To support upgrades and meet customer requirements Web Server can be installed by applying below steps –
Note: Before applying below steps, it is assumed that only EPO 2021 is installed. (If any web server or client is already installed, then same needs to be uninstalled first and Delete the folder 'PlantSCADA' located at C:\Inetpub\wwwroot\).

Install the ESXP Power Operation WebServer from the PO2021 ISO file (PO_2021_21196.01\setup\Installers\Core\WebServer\setup.exe).
Download the attached zip file and unzip to get the 'PlantSCADAWebClient_8_30_0_518.cab' file and copy it to the location => C:\Inetpub\wwwroot\PlantSCADA\client\830
Make sure the configuration is done as defined in the Plant SCADA Web Client help.
Below INI settings are added in the EPO 2021 machine in which web server is installed.

[LAN]
TCPIP =1
[WebServer]
DeployRoot = C:\Inetpub\wwwroot\PlantSCADA\deploy
WebClientCab = 830/PlantSCADAWebClient_8_30_0_518.cab

Deploy the project in web client folder by pressing 'Prepare Web Deployment' button from PO Studio.

Now launch web client in IE and select control client user for the project deployed

NOTE: The classic activex web client is not officially supported in EPO 2021.