Can't find and delete an antivirus exclusion made in MECM.

In the Microsoft Endpoint Configuration Manager current brunch I've added some of the detected malware to exclusions list via right-click in the section "Monitoring-Security-Endpoint protection status - Malware detected" and "Allow this threat". They were excluded for all the computers in a collection. How and where to find this exclusions and delete them? They are appeared on the client computers but not in the MECM Antimalware policies.