计划任务不显示在 Get-ScheduledTask 结果中

Question

I have defined some scheduled task using Windows Task Scheduler GUI under "" [default] path but when i run Get-ScheduledTask in powershell, it does not return them. why?

I have tried with Get-ScheduledTask -TaskName "MyTaskName" with one of my task name but it comes up with "No MSFT_ScheduledTask objects found with property 'TaskName' equal to 'MyTaskName'"

Actually I have tried https://library.octopusdeploy.com/step-template/actiontemplate-windows-scheduled-task-disable but it doesn't work so I have tried running script directly.

UPDATE I have found the following script to get task list on http://www.fixitscripts.com/problems/getting-a-list-of-scheduled-tasks :

# PowerShell script to get scheduled tasks from local computer
$schedule = new-object -com("Schedule.Service")
$schedule.connect() 
$tasks = $schedule.getfolder("\").gettasks(0)
$tasks  | Format-Table   Name , LastRunTime    # -AutoSize
IF($tasks.count -eq 0) {Write-Host “Schedule is Empty”}
Read-Host

Answer 1

UAC

The result is likely affected by UAC . To see everything try right clicking the PowerShell icon, select Run as Administrator and then run your Get-ScheduledTask command again and see if that changes anything.

Further reading: http://david-homer.blogspot.co.uk/2017/10/not-all-scheduled-tasks-show-up-when.html

Answer 2

Have you tried using a com object? This code works for me:

# FOR A REMOTE MACHINE
$s = 'SERVER_NAME' # update this with server name
($TaskScheduler = New-Object -ComObject Schedule.Service).Connect($s)


# FOR LOCAL MACHINE
($TaskScheduler = New-Object -ComObject Schedule.Service).Connect()

#now we can query the schedules...
cls;$TaskScheduler.GetFolder('\').GetTasks(0) | Select Name, State, Enabled, LastRunTime, LastTaskResult | Out-GridView

This code will retrieve a particular task and enable it:

$task = $TaskScheduler.GetFolder('\').GetTask("TASKNAME")
$task.Enabled = $true

Answer 3

When running Get-ScheduledTask from a user-level prompt, even if the user is an administrator, they will see only the tasks that they can read with user-level permissions. Seeing them in the TaskSchd.Msc window indicates that program is running with different permissions.

Therefore, running a PowerShell prompt as administrator solves the problem.

The same issue occurs when using SchTasks.exe from a command prompt.