In UIM 20.4 OC GA Versions it doesn't seem possible, In the OC alarm viewer, to display the last occurrence of an alarm.
The only date columns that can be added are "Arrival Date" and "Creation time & date" which both correspond to the first occurrence date.
The only way to see the date of last occurrence of an alarm is to double-click on this alarm and to position yourself on the History tab.
How can we sort out alarms so that the first one is the lastest received?
Release : DX 20.4 CU1 and earlier
Product Feauture missing
Starting from DX UIM 20.4 CU2, the OC Provides the ability to include the "Last Occurrence Field" in the OC Alarm Viewer