The manual briefly mentions that it uses HTTP Authentication to communicate with external systems (http://manuals.matrix.squizsuite.net/web-services/chapters/soap-server). It doesn't mention much more.
Is this on by default, because it doesn't seem like it is to me. I have tried changing all of the System Preferences for HTTP Auth and none of them will make accessing our SOAP Server show an HTTP Auth dialog box.
Am I missing something here?