I'm getting DataSource.NotFound: OData: Request failed (404) error when open connection

Question

Hi,
I have a simple OData service running in a server. When I try to call him in a browser all works fine. But in Excel Power Query, after the user authentication step, I get this error in Query editor
DataSource.NotFound: OData: Request failed (404): The remote server returned an error: (404) Not Found.
Details:
    http://<URL>/GIPJAM/$metadata
The service is configured in a server and he his public. The URL (working in browser) http://<URL>:91/GIPJAM/
This may be a port (91) problem? My application runs in port 80. This 91 port is to guarantee that the server is public. For exemple, if I run in my home network, using the name of the machine in the URL (like; http://quiron.blabla.net/GIPJAM/) all works
in browser and in Excel PQ.
I've made every test I can remember but i'm newbie in OData services and server, IIS and network configurations. 
Anyone can help me?
Regards,
Filipe Almeida
EDIT: I have this workaround implemented: https://social.technet.microsoft.com/Forums/en-US/dc0ca6ff-6583-4373-a31f-acb95e8046ef/connecting-to-odata-feed-using-powerquery-216-results-in-404-error?forum=powerquery
I'm using Power Query 2.16 and Excel 2013, with a Odata V4 Service in Web .NET API 2.2

Answer 1

It looks like your service probably supports V3 and V4 or you'd be getting a different error message. What I suspect is happening is that the service doesn't know that it's listening on port 91 and so it's returning URLs embedded in your result -- either
the xml:base on an XML body or the metadata link in a JSON body -- which don't reflect the port number. You can easily verify this by using Fiddler to look at the results. If any of them have an URL that's missing the ":91", that's an indication
that you'll need to fix this on the service side.