Problem mit Standarddrucker auf RDS. GPO nur nach manuellem gpupdate

<#
.SYNOPSIS
    This Script read the "Defaultprinter" from  Registry Key ( HKCU\SOFTWARE\MyCompany) and set the corresponding PrinterObject as default  
.DESCRIPTION
    
.NOTES
    File Name      : Printer_logon.ps1
    Author         : 
    Prerequisite   : PowerShell V2 over Vista and upper.
    
.Remark
    13.09.2019 initial Release
#>



if (test-path HKCU:\SOFTWARE\MyCompany)
{ 
$DefPrinter=get-ItemProperty -Path HKCU:\Software\MyCompany\ -Name DefaultPrinter
$Counter = 0

do {
    Start-Sleep -Seconds 1
    $PRexisit  = (get-wmiobject Win32_Printer ).name -like $DefPrinter.DefaultPrinter 
     $Counter = $Counter + 1
}while($PRexisit.Length -eq 0   -and  $Counter -le 10 ) 

if ($PRexisit.Length -ge 0)
{ 
(New-Object -ComObject WScript.Network).SetDefaultPrinter($DefPrinter.DefaultPrinter)
$Messagetext = $env:Username + " Standartdrucker gesetzt:  " + $DefPrinter.DefaultPrinter + " / " + $Counter + " Versuche"   
write-eventlog    -entrytype "Information"    -logname "Application"    -eventID 1    -Source 'MyCompany'    -Category 0    -Message $messagetext  
}


}

 $CheckPrinter  = (get-wmiobject Win32_Printer ).name -like $DefPrinter.DefaultPrinter

#creating object os WScript
 $wshell = New-Object -ComObject Wscript.Shell -ErrorAction Stop
#invoking the POP method using object
 $wshell.Popup("Ihr Standartdrucker ist: " + $CheckPrinter ,5,"Standartdrucker von " + $env:Username ,0)  

<#
.SYNOPSIS
    This Script writes the Defaultprinter into the Registry Key in HKCU\SOFTWARE\MyCOmpany
.DESCRIPTION
    
.NOTES
    File Name      : Printer_logoff.ps1
    Author         : 
    Prerequisite   : PowerShell V2 over Vista and upper.
    
.Remark
    13.09.2019 initial Release
    27.09.2019 Anpassung für den Fall: Kein Standartdrucker gesetzt / auslesbar
    20.01.2022 Erweiterung um Unterscheidung Remoteapp oder Fill Desktop via Clientname
#>

if ($env:clientname -like '*' -or $env:clientname -like 'UD-Pocket*' ) {  

        $DefPrinter = (get-wmiobject Win32_Printer -filter "Default=TRUE").Name   

        if ($DefPrinter)
        {
                if (test-path HKCU:\SOFTWARE\MyCOmpany)
                    { 
                            Set-ItemProperty -Path HKCU:\Software\MyCOmpany\ -Name DefaultPrinter -Value $DefPrinter 
                    }
                    else 
                    {
                            $DefPrinter = (get-wmiobject Win32_Printer -filter "Default=TRUE").Name  
                            
                            New-Item -Path HKCU:\SOFTWARE\MyCOmpany 
                            New-ItemProperty -Path HKCU:\SOFTWARE\MyCOmpany -Name DefaultPrinter -PropertyType String 
                            Set-ItemProperty -Path HKCU:\Software\MyCOmpany\ -Name DefaultPrinter -Value $DefPrinter 
                    }

                $Messagetext = $env:Username + " Standartdrucker:  " + $DefPrinter + " in Registry gespeichert "  
                write-eventlog    -entrytype "Information"    -logname "Application"    -eventID 2    -Source 'MyCOmpany'    -Category 0    -Message $messagetext  

        }
        else 
        {
            $Messagetext = $env:Username + " Standartdrucker nicht in Registry gespeichert "  
            write-eventlog    -entrytype "Information"    -logname "Application"    -eventID 3    -Source 'MyCOmpany'    -Category 0    -Message $messagetext  
        }
}
else {
        $Messagetext = $env:Username + " Standartdrucker für Remoteappuser  nicht in Registry gespeichert "  
        write-eventlog    -entrytype "Information"    -logname "Application"    -eventID 99    -Source 'MyCOmpany'    -Category 0    -Message $messagetext  
}