1. In your ArcGIS Server Manager machine, use Windows Explorer, open this file in Notepad<a href="file:C:/Inetpub/wwwroot/ArcGIS/Manager/Web.config" target="_blank">C:\Inetpub\wwwroot\ArcGIS\Manager\Web.config</a>2. Scroll to the end of the file before the last line </configuration>, add these lines<<a href="http://system.net" target="_blank">system.net</a>><defaultProxy><proxy proxyaddress ="<a href="http://10.13.102.3:8080" target="_blank">http://10.13.102.3:8080</a>" bypassonlocal="True" usesystemdefault="False" /></defaultProxy></<a href="http://system.net" target="_blank">system.net</a>>After you alter it, the end of the web.config file look like this:</httpModules></system.web><<a href="http://system.net" target="_blank">system.net</a>><defaultProxy><proxy proxyaddress ="<a href="http://10.13.102.3:8080" target="_blank">http://10.13.102.3:8080</a>" bypassonlocal="True" usesystemdefault="False" /></defaultProxy></<a href="http://system.net" target="_blank">system.net</a>></configuration>3. Please change the IP address of your proxy server and the port number accoringly. You can also use the Fully qualified domain name such as <a href="http://proxy.esri.com" target="_blank">proxy.esri.com</a>, etc...4. After creating new web application, you need to modify the web.config for every single web application. For example, your web application is USA_Map, you need to modify the following file<a href="file:C:/Inetpub/wwwroot/USA_Map/web.Config" target="_blank">C:\Inetpub\wwwroot\USA_Map\web.Config</a>