We are piloting the OData External Data Source Connector.
The service we are testing was sourced from sql server stored procedures with parameters.
The "tables" sync successfully, but throw an error when an attempt is made to access them.
Unable to complete OData query for 'CustomerAccountSet'. Please check service status and authentication attributes Error ID: 509387730-25493 (702911041)
I can access the urls beneath the endpoint just fine via the ajax toolkit on a VF page, but cannot query or view the synced external objects.

We had great success accessing test external objects from http://services.odata.org/Northwind/Northwind.svc, so we know that the connector works well under certain circumstances.

Thanks, mb