Download link -> https://www.iis.net/downloads/microsoft/application-request-routing Why need ARR -> https://forums.iis.net/t/1238284.aspx?Flush+IIS+Cache+without+recycling+the+application+pool (read very last reply) How to config and clear cache -> https://docs.microsoft.com/en-us/iis/extensions/configuring-application-request-routing-arr/browse-cached-contents-on-disk-on-application-request-routing Static cache -> https://docs.microsoft.com/en-us/iis/configuration/system.webserver/staticcontent/clientcache