If all dirs are enabled on the user in Emby the EnabledFolders returns a empty list []. Because Emby expect you to get all LibraryFolders This is done with api call to http://192.168.1.6:8096/emby/Library/MediaFolders The data returned on this is:
{'Items': [{'Name': 'custom added folder',
'ServerId': '98ffcead6abf4e1785aebfc328eb64d0',
'Id': '4e57254b22890e8821d40369b5fbc5f6',
'Etag': 'cf80ced1811a32f28483093ad517d5f3',
'DateCreated': '2018-12-02T18:37:20.0000000+00:00',