Check Enable outgoing access and add the Integration Server URL to allow Dekho to call out to integrated applications.
Some integration connectors require to be called back from Dekho. Enter your integration Server URL and a second or two after click outside of the text box, the Integration Systems combo box will be populated with the list of integration systems from your InstaLink server. Select Esri Australia Dekho from the list and then enter (in lower case) dekho and then click the Add button. The Dekho integration connector is now registered for callbacks. This is all that most integration users will need.
See this document for help on integrations with InstaLink.