When an alarm has not been assigned, the “Assigned At” column is NULL in the database. When exporting the table to excel using the drop down within the Alarm Viewer, this field displays ‘1/1/1970, 12:00:00 AM' (in UTC) for these records.
Release : 20.3.2
Component : UIM OPERATOR CONSOLE - ALARM VIEWER
This issue is resolved in UIM 20.3.3. After upgrading, the field in the exported excel file is blank whenever the "Assigned At" column is NULL.
You can download the files for UIM 20.3.3 here:
CA Unified Infrastructure Management Hotfix Index - CA Technologies
The release notes for UIM 20.3.3 are here: