[ScheduledTask] Disabling scheduled task fails with incorrect user name or password error

[ykuijs]

Details of the scenario you tried and the problem that is occurring

I try to disable a scheduled task using the ScheduledTask resource. Unfortunately this results in the error "The user name or password is incorrect.", thrown by the Register-ScheduledTask cmdlet.

I have been able to track this back to the following lines:

ComputerManagementDsc/source/DSCResources/DSC_ScheduledTask/DSC_ScheduledTask.psm1

Lines 1634 to 1636 in 794d401

	$existingTask = ScheduledTasks\Get-ScheduledTask @PSBoundParameters
	$existingTask.Settings.Enabled = $false
	$null = $existingTask | Register-ScheduledTask @PSBoundParameters -Force

Verbose logs showing the problem

Suggested solution to the issue

Why is is there a custom Disable-ScheduledTask function? When I remove this, so PowerShell reverts back to the default Disable-ScheduledTask cmdlet, it works as expected.

The DSC configuration that is used to reproduce the issue (as detailed as possible)

ScheduledTask 'DisableWFSchedTask'
{
    TaskName = 'Workflow Manager 1.0 CEIP Uploader Task'
    TaskPath = '\Microsoft\Windows\PowerShell\ScheduledJobs'
    Enable = $false
}

The operating system the target node is running

Windows Server 2016 with all most recent patches

Version and build of PowerShell the target node is running

v5.1

Version of the DSC module that was used ('dev' if using current dev branch)

7.1.0.0 and dev

[ykuijs]

There is something specific with this task. I am just unable to disable this specific task. When I run the following commands, the same error is displayed

$taskname = "Workflow Manager 1.0 CEIP Uploader Task"
$taskpath = "\Microsoft\Windows\PowerShell\ScheduledJobs\"

$task = ScheduledTasks\Get-ScheduledTask -TaskName $taskname -TaskPath $taskpath
$task.Settings.Enabled = $false
$task | Register-ScheduledTask -TaskName $taskname -TaskPath $taskpath -Force

Register-ScheduledTask : The user name or password is incorrect.
At line:6 char:9
+ $task | Register-ScheduledTask -TaskName $taskname -TaskPath $taskpat ...
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : AuthenticationError: (PS_ScheduledTask:Root/Microsoft/...S_ScheduledTask) [Register-ScheduledTask], CimException
    + FullyQualifiedErrorId : HRESULT 0x8007052e,Register-ScheduledTask

Using the same code for other tasks, they can be disabled just fine.

I am running these commands in an elevated PS process.

[PlagueHO]

Hi @ykuijs - that is pretty odd. What does the Principal property of the task look like? E.g.

$taskname = "Workflow Manager 1.0 CEIP Uploader Task"
$taskpath = "\Microsoft\Windows\PowerShell\ScheduledJobs\"

$task = ScheduledTasks\Get-ScheduledTask -TaskName $taskname -TaskPath $taskpath
$task.Principal

[ykuijs]

The Principal is:

DisplayName         : 
GroupId             : 
Id                  : Author
LogonType           : Password
RunLevel            : Limited
UserId              : [DOMAIN]\[USERID]
ProcessTokenSidType : Default
RequiredPrivilege   : 
PSComputerName      : 

[ykuijs]

Did some more troubleshooting and discovered that this code always fails when you create a task that has "Run whether user is logged on or not" configured.

The PowerShell native "Disable-ScheduledTask" (PSv5 and above only) works fine on these tasks.