Powershell OnlyInJobError - powershell

Question

Weird problem I saw today and I don't understand.
Is there a difference beetween running a script manually in the ISE or Pshell, and as a job?
If I run it manually the code doesn't throw an error - runs smoothly:
Get-ChildItem "\\SERVER\S$\ROOT\DIR" -Recurse | Where {$_.creationtime -lt (Get-Date).AddDays(-35)} | Remove-Item -Force -Include *.conf
But if I run it via Job and let the it export the $error to a txtfile this happens:
Are the rights of my running machine different to the rights of the scheduled job?
Get-ChildItem : Zugriff verweigert
In Zeile:81 Zeichen:1
+ Get-ChildItem "\\SERVER\S$\ROOT\DIR" -Recurse | Where
{$_.creati ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Get-ChildItem], UnauthorizedA
ccessException
+ FullyQualifiedErrorId : System.UnauthorizedAccessException,Microsoft.Pow
erShell.Commands.GetChildItemCommand
Zugriff verweigert = Access denied
Oh, totally forgot to tell about my windows rights.
Normally the Server I am connecting to is blocked for everybody - except for login with credentials ofc. But somehow my manual powershell script is able to delete and create files?
In "job-mode" it loses it's abilities.
Edit:
Same for the Test-Path commandlet. Manually it shows me true or false. Via job it throws an error.
EDIT - SAME PROBLEM COMPLETELY DIFFERENT Commandlets:
$username = "Administrator"
$password = cat C:\securestring.txt | convertto-securestring
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $password
New-PSDrive -Name Z -PSProvider FileSystem -Root \\Server\ROOT -Credential $cred -Persist
test-path 'Z:'
Remove-PSDrive -Name Z -PSProvider FileSystem
This works!
This does not:
$jobname = "Test5"
$JobTrigger = New-JobTrigger -Daily -At "00:18 PM"
$MyOptions = New-ScheduledJobOption -ContinueIfGoingOnBattery -HideInTaskScheduler -RunElevated
Register-ScheduledJob -name "$jobname" -scriptblock {
$username = "Administrator"
$password = cat C:\securestring.txt | convertto-securestring
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $password
New-PSDrive -Name Z -PSProvider FileSystem -Root \\Server\ROOT -Credential $cred -Persist
test-path 'Z:'
Remove-PSDrive -Name Z -PSProvider FileSystem
} -trigger $JobTrigger –ScheduledJobOption $MyOptions

Answer 1

You probably have the job running under the SYSTEM account. Use the -Credential parameter to provide your account credentials (whatever account you're logged in with when you successfully run the command interactively).
BTW, Register-ScheduledJob uses the Task Scheduler. You can check the properties of the job in Task Scheduler to see what account it's configured to run as.

Answer 2

Well, it is not exactly an answere to my original question, but I was able to work around my problem by using the invoke-command and test-path from there and giving argument via the -arg.
Invoke-Command -ComputerName $FTPADRESS -ArgumentList $DIRECTORY -ScriptBlock {param ($DIR)
$check = Test-Path -Path "\\SERVER\ROOT\$DIR"
if ($check -ne $true) {New-Item -ItemType directory -Path "\\SERVER\ROOT\$DIR"}
}
Same works with the get-childitem.