Did you find any solution to this? I'm running into the same issue.
Same issue over here:
The set-up of the application is as follows: we want not-known-SAP/SCP end-users to access our Mendix application that’s going to need to consume an OData service of an OnPremise system. The documentation is rather defered: use basic authentication, use principal propagation, us the GetDestination-method, use the GetCloudConnectorInfo-method, etc.
There’s one constant in our quest, and that’s the HTTP 560 error, checking the logs: the hostname shouldn’t be known. Yet, when we deploy another application on CF (non-Mendix), we can perfectly access the OData service and fetch the data.
Should there be any experience in the community regarding this kind of issue: would be gladly appreciated!