About Event suppression
Event suppression is the process of ignoring events that are generated due to a higher-level event or known events. A good example is the mailboxes of the users who have left the organization. The corresponding connector displays events for these mailboxes, as the statuses of the mailboxes are inactive.
Reducing the volume of events is possible by defining event suppression rules. It reduces the number of events that help identify critical events and take action to rectify them.