InfoPath Dev

do you know other article other than this? I can't make it works.

http://msdn2.microsoft.com/en-us/library/bb952744.aspx

 Not sure about this part

// Create an XPathNavigator to walk the form's data source.
XPathNavigator xnDoc = this.MainDataSource.CreateNavigator();

XmlNamespaceManager ns = this.NamespaceManager;

Hi lofly,

You could buy and install our Active Directory web service on the server and be done in a few minutes:

http://www.qdabra.com/en/products/ADWebService.aspx

 Let me know if you have any problems getting it to work.  It's pretty straightforward and easy!