I have asked this question on stackoverflow as well but no answer.

I'm trying to call sharepoint webservices in a C# console application. The code works fine when I use my local system's WSS as target application but it doesn't work with another server accessible over the web. Here is my code:

Webs service = new Webs();
            service.PreAuthenticate = true;
            service.Credentials = new System.Net.NetworkCredential(login, password);
            //service.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;

            service.Url = url + @"/_vti_bin/webs.asmx";

            XmlNode sites = null;

                sites = service.GetWebCollection();
            catch (Exception ex)

Points to note:

  1. It neither work with DefaultNetworkCredentials nor with my domain user credentials.

  2. The webservice end point if pasted in a browser successfully list the web service methods.

  3. I get 401 unauthorized error in all cases(accessing the remote server).

Am I missing something?

  • Hi there. I haven't tested your code, but when working with Sharepoint References from a Console application, you have to set your build to 64bit (since SP2010 is 64 bit only)
    – Fox
    Commented Feb 9, 2012 at 6:34
  • Thanks for your response but I'm trying to access MOSS 2007 webservice. Commented Feb 9, 2012 at 8:14
  • what kind of authentication is accepted by the target server ? What is the subcode of the error ? 401.1, 401.2, etc.. This can be found only in the IIS log files.
    – Steve B
    Commented Apr 11, 2012 at 9:20

1 Answer 1


Did you check your App pool account? May be your application pool account does not have enough rights. Change your application pool account to an account that has full permissions on your site and try again. It should work.

UPDATED : After some exploration, I found that this could be a known issue if you install Microsoft Windows XP Service Pack 2 (SP2) or Microsoft Windows Server 2003 Service Pack 1 (SP1). To solve this, you can follow the steps in this KB article - http://support.microsoft.com/?scid=kb;en-us;896861&x=14&y=17.

  • But if the App Pool user has no access then it should not allow to hit the URL successfully in browser. What do you think? Commented Feb 9, 2012 at 8:21
  • Please see my updates :)
    – Deepu Nair
    Commented Feb 10, 2012 at 8:24
  • That really helped. :) Commented Feb 10, 2012 at 12:37

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