There are two methods of working with 3 rd party apps: through Remote Portal and Configuration Manager.
The methods using the Configuration Manager can be used both with an online system (cameras connected to the internet) and an offline system (no internet connection to local system).
Once apps are installed on the camera, the configuration interface for each app can be accessed through the Local App Management Console on the camera. No internet connection required.
In this article you will find the step-by-step guide where is described the method using Configuration Manager.