(imported comment written by SystemAdmin)
Set the ‘Track Primary User’ task that you downloaded to run as a ‘Policy Action’ (no start or end date). On the Execution tab of the ‘Take Action’ dialog, check ‘Reapply this action’ on ‘whenever it becomes relevant again’. Target your all Windows machines and execute.
Log on and off a few machines to generate some data.
The ‘Primary User’ property should be enabled and evaluating on every report. You should then see data.