Eurocontrol tracking is the new setting that allows including/excluding the aircraft in the Eurocontrol integration.
This setting is located in the Admin Panel > Fleet > 'OPS' tab in the edited aircraft details.
In the FLIGHT WATCH / MVT in the 'OPS' tab the following options are available:
If the integration with Eurocontrol is active, the Eurocontrol tracking is set to the 'Tracking' option by default.