I have tried running it as a local Administrator as well as a full-fledged domain admin account (this is a domain-joined server). I can run the script within the Task Scheduler manually and it works.

Learn how to use Windows Task Scheduler to automate essential PC maintenance tasks, saving time and ensuring your computer ...

Tom Fenton details step-by-step directions to configure Windows 10 to allow running Task Scheduler and how to set up an automated task to run a PowerShell script every four hours.

On Windows 10, you can automate tasks with the Task Scheduler, and in this guide, I'll show you the steps to create basic and advanced tasks on your device.