What must happen to all deployed platforms when changes are made to Advanced Communications Management?

When changes are made to Advanced Communications Management within AVEVA Application Server, all deployed platforms must be restarted to ensure that the changes are applied effectively. This is necessary because the application server needs to reload its configuration and any new data or settings that have been modified. A restart allows the system to clear its previous state and fully adopt the new configurations.

In contrast, the other options do not accurately reflect the behavior needed to implement changes. For instance, updating all platforms manually would not suffice, nor would it guarantee consistency across the system. The option suggesting that no action is needed overlooks the fundamental requirement of synchronizing the system with the latest changes. Lastly, while only restarting affected platforms might seem efficient, it could lead to inconsistencies or operational issues if not all platforms are aligned with the latest management settings. Thus, a complete restart ensures that every instance operates with the same updated information and functionalities.