I have installed Portal for ArcGIS 10.2 on our network, have installed the SSL certificate, and configured the Web Adapter. I have also created user accounts with both Publisher and Administrator privileges. So far so good.
However, when I log in as one of those users, go to My Content and upload a shapefile, I do not get the "Publish this file as a feature layer" checkbox. If I upload the shapefile and then edit its properties, I do not see the Publish button. Thus I can't add any layers to a map.