title: PowerShell: Update Scheduled Task username and password?
body: <p>I'm looking for a way to update the credentials on existing scheduled tasks on machines.</p>
  
  <ul>
  <li>Schtasks doesn't work for AT created scheduled tasks</li>
  <li>Win32_ScheduledJob only works for AT created jobs</li>
  <li>Schedule.Service COM object - not sure</li>
  </ul>
  
  <p>It appears that I can use RegisterTask and RegisterTaskDefinition to CREATE scheduled tasks but I'm not clear if I can update the existing credentials with those methods.  Please advise.  Thx.</p>