Hi Marcel.
This is not well documentet. In the Documentation you find this:
Since brief state changes – depending on the periodic interval selected on the central site – may not be visible, a notification through the central site is not ideal. If however the central site is utilized as a purely display site – as a central overview of all customers for example – this method definitely has its advantages.
You need to have the notificatein, when you like to have the problems in your ticket systems, also from dumped sites.