We have one upstream server and one downstream server configured. We use downstream server to update the patches for all desktop clients. Downstream server is configured to get the updates from upstream server which is configured to use proxy server for updates and we have enabled "Download update files to this server only when updates are approved" on both server. So If we apporve pathces on downstream server, will it look for updates only in the upstream server or if the updates are not available in the upstream server, will it intiate to download from internet in upstream server. How we can do the best configuration on both upstream and downstream server.