I know that this question has been asked before here, I used to have the same problem as Anjisan, I have a web service that could call Outlook Application from Visual Studio but couldn't from published code on IIS thanks to the Accepted Solution it worked on my pc when i published my web service to IIS by following this steps:
(1)Enter identity credentials to impersonate either in web.config or through iis and (2) give write access to that same user in Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files
but I have to put my web service on another pc for final usage, I've tried following same steps on the server but I didn't succeed to make it work. I have been reading on many articles on the web including solutions with dcomcnfg command and changing permission for the impersonation user but still no hope for me. Please can anyone give me any other hint, because I am totally running out of ideas and been days working to make this work.