Excel expects an XML service doc, but it doesn't send any Accept header. By default ASP.NET Web API OData sends back a JSON service doc when no Accept header is specified. As a result you cannot consume a default ASP.NET Web API OData service using Excel.
We should switch our default format for service documents to be XML.
Comments: Please post the details of the issue you are seeing to the discussion forums and include the version of the assembly that you are running against.
We should switch our default format for service documents to be XML.
Comments: Please post the details of the issue you are seeing to the discussion forums and include the version of the assembly that you are running against.