Open IIS Manager and select server node in the tree view on left hand side Double click on "Application Request Routing" icon In the Actions pane on right hand side select "Server Proxy Settings" In the dialog uncheck "Preserve Host Header"

I think you may need to configure ARR to not preserve original host headers when forwarding requests. There is a configuration property in ARR schema called preserveHostHeader. Try setting it to False.

Dear all, I've a Windows 2008 Server as my public Web server. I've an Apache 2 as my private server, for Unix web application only (like Horde). I want to have a rule that redirect all incomming query from http://www.mydomain.com/horde to http://xx.xx.xx.xx/horde. Redirection like ProxyPass,...