I followed the steps provided in the https://docs.microsoft.com/en-us/windows-server/manage/windows-admin-center/extend/prepare-developme... to create the IFrame extension.
So we have the web application which can communicate within the same subnet.
Suppose we need the to install the our web application in each server and each server has static IP address assigned to it and want to manage that web application using WAC
1. Created the extension on laptop.
2. Added the one server from the WAC using laptop.
But how to get the added server IP address in IFrame?
Need your help please