On domain separated instance, em_unique_nodes has many entries with type "Unknown". However the nodes exist on CI table.Issue On domain separated instance, em_unique_nodes has many entries with type "Unknown". However the nodes exist on CI table.CauseOut of the box, the em_unique_nodes entries are calculated based on em_event. (If you have added system property "evt_mgmt.use_alerts_cis_in_license, true", then it's based on em_alert) If the CI and the em_event are in different domains, then the CI will be marked as Type: Unknown on em_unique_nodes table. ResolutionPlease try to keep em_event / em_alert in the same domain as the related CI.