I have an IIS 7 server setup, where I want execute an external application (locally on the server) from a ASP.NET website, to do some processing of some files. The server seems to find the .exe fine, and it "might" be executing the executable as well, but I get no output from the executable. I am guessing I am dealing with permission issues, and either the executable is not being executed at all or it is not allowed to write files. So do anyone have any hints on how I can make sure that IIS is allowed to execute external applications? Or should IIS be able to do that by default, and my issue is in a totally different ballpark?