Acho que descobri:
Get-ScheduledTask | Where-Object { $_.State -ne "Disabled" } | Select-Object TaskName, TaskPath, Triggers | Where-Object { $_.Triggers -match "MSFT_TaskIdleTrigger" }
Resultado:
TaskName Triggers TaskPath -------- -------- -------- Installation {MSFT_TaskLogonTrigger, MSFT_TaskIdleTrigger} \Microsoft\Windows\LanguageComponentsInstaller\ XblGameSaveTask {MSFT_TaskIdleTrigger} \Microsoft\XblGameSave\