IoTHub and Device Connection Stringshttp://developers.de/blogs/damir_dobric/archive/2015/10/13/iothub-and-device-connection-strings.aspxIoTHub introduce new kind of connection string called Device Connection string. To create device client instance you can do following: var client = DeviceClient .Create(“HUBNAME.azure-devices.net”, new DeviceAuthenticationWithRegistrySymmetricKey ( "DEVNAME"enCommunityServer 2008 SP1 (Build: 30619.63)