MailboxMonitoringHistory table empty

Hello,

I started to test EVOM more deeply last days and I noticed (in 3 different EV versions/installations) that tables MailboxMonitoring & MailboxMonitoringHistory in EV Monitoring DB are empty. That's contrast with Service|Task Monitoring[History] tables which are used as expected and corresp values are presented in EVOM console.

Is there a way how to start to monitor also these mailbox related parameters? Table MailboxParameterConfig seems to be ready with some parameters pre-configuration.