Microsoft service parameter 'redirect_uri' in oama ?#53

The way I used ```mailctl``` was behind a proxy (https://sub.mydomain.com), which worked fine due to a microsoft service option ```redirect_uri``` to help with the response from Microsoft. ```oama printenv``` does not show this option. A brave attempt to add ```redirect_uri``` in the config.yaml did not work either. :) Manually changing the URL in the browser from http://localhost:8080 to the redirect URL results in a working result (oama received the token). Is this option or an alternative available? If not, is there a plan to add it in the future? Or am I making a mistake somewhere?