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HTTP Post msxml3.dll error '800c005'

HTTP Post msxml3.dll error '800c005'

HTTP Post msxml3.dll error '800c005'

I would have replied to the thread 1281365 but it's closed.

I used that thread to get most of the HTTPPOST code.

There seems to be quite a few posts on this error, but as I am already subscribed here and so many people have helped me on this site, I am sharing here.

I was getting the error:
msxml3.dll error '800c0005' The system cannot locate the resource specified.

Our corporate environment sits behind MS ISA proxy. My web server is IIS 7 on Windows Server 2008 R2. The site consists of two simple asp pages.
I found entering the POST URL straight into the browser, it worked, yet through IIS and my web page, I couldn't even see the external request hitting the proxy. However, on my personal laptop off the corporate network, it worked fine.

After many hours of thinking the code was wrong, something I came across a while ago made me think about setting the proxy using WinHTTP. My IE proxy was already set up correctly so I was able to use the command from the IIS box:


C:\> netsh winhttp import proxy source=ie

Once I did that, it work straight away.

The other thing I found is that you need "http(s)://" in the URL to post.

MS Reference Article

A little side-tip for google to pick up, you need to use netsh to set the static routes. I found this when configuring Exchange 2010 clustering. It stops the flip-flop between cluster nodes. (Assuming one's network has static routes). On Win2K8 server, it doesn't like the old dos routeadd command.

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