http://developers.de/blogs/damir_dobric/archive/2017/06/12/iothub-device-twin-unauthorizedexception.aspx  When working with device twins and IoTHub, you have to be aware of security requirements of certain methods of the service twin API. For example to get the instance of the twin or to update the twin you will need ‘ ServiceConnect’ permission.  enCommunityServer 2008 SP1 (Build: 30619.63)