I use the asp.net webforms viewer and set the report by setting
reportViewer1.ReportSource.Identifier = reportFile;
I have a controller which uses a custom resolver
public class ReportsController : ReportsControllerBase
Apparently this page uses the REST service to load the report but how does it know what url to use for the service? I haven't configured this explicitly as far as I can see so it seems to be hardcoded/defaulted?