Hi expert:
Universal forwarder on windows can collect data from windows Server. Technology Add-on for Windows run on universal forwarder. They can collect data from system both. What is the different between universal forwarder on windows and Technology Add-on for Windows.
Universal forwarder is the binary application of splunk that collects data and sends it on. The TA for windows is the "app" for splunk that is the collection of configuration files that specify what to collect.