Add "Monthly" Trigger to ScheduledTask

[ephos]

Request:
ScheduledTask does not allow the ability to do a monthly trigger, with this functionality missing it makes it difficult to use DSC to create a task that runs on a specific day each month. This resource lacks feature parity with it's PowerShell/GUI alternatives.

Use case example:
Run a task on the 3rd Monday of each month.

Additional Notes:
This can be worked around somewhat by the suggestions in #173 but having to manage doing this through logic external to the resource seems counter productive to using something declarative like DSC.

[johlju]

Can't this be accomplished with the WeeksInterval parameter and have the ScheduleType set to Weekly?

How would you otherwise set a monthly trigger using the PowerShell commands?

[Borgquite]

Running into these issues when trying to resolve this using the Get-CimClass / New-CimInstance process that's working well already for OnIdle, OnEvent, AtCreation and OnSessionState

PowerShell/PowerShell#7292

At present until any underlying PowerShell issue is resolved, it looks like it might only be possible by using a COM Object, or shelling out to schtasks.exe (yuck!)

https://web.archive.org/web/20161026024255/https://www.slightfuture.com/devel/idle-task-scheduler-powershell
https://stackoverflow.com/questions/58455215/create-monthly-trigger-for-scheduled-task-in-powershell-with-additional-criteri
https://stackoverflow.com/questions/34799923/powershell-monthly-scheduled-task-trigger

[johlju]

Probably wont help, but look at the #Fringe channel on Discord (same place as #DSC channel). ScheduleTask was mentioned there yesterday or the day before in relations to the problem with not all API are surfaced. Good source for deep learning if nothing else 😊

[Borgquite]

@johlju Just posted. Let’s see if I’ve missed a trick!