I am trying to connect the XML webpart to a XML source provided by
SQLXML. Everything works fine if the SQLXML Virtual Directory is
setup to always logon with the credentials of a specified SQL
account. However, if I configure the SQLXML Virtual Directory to use
Windows Integrated Authentication, I get the error "Cannot retrieve
the URL specified in the XML Link property. For more assistance,
contact your site administrator." In the XML Web Part Tool pane, I
can click the "Test Link" and the link returns the proper XML. I am
guessing that when rendering the XML Web Part must be using some
other set of credentials to access the XML link. Does anyone know
what type of credentials the XML webpart uses or how it actually
connects the XML link?