Windows Updates remote per Powershell abfragen und installieren

$adminUsername='<domain\admin-user>'  
$plaintextPassword='<admin-user-password>'  
$encryptedPassword=ConvertTo-securestring $plaintextPassword -AsPlainText -Force
$adminCredential=New-Object -TypeName System.Management.Automation.PSCredential -Args $adminUsername,$encryptedPassword

$Computername = '<server-ip>'  
$updatesession = [activator]::CreateInstance([type]::GetTypeFromProgID("Microsoft.Update.Session",$Computername))  
$UpdateSearcher = $updatesession.CreateUpdateSearcher()
$searchresult = $updatesearcher.Search("IsInstalled=0") # 0 = NotInstalled | 1 = Installed  
$searchresult.Updates.Count

$Updates = If ($searchresult.Updates.Count -gt 0) {
#Updates are waiting to be installed
$count = $searchresult.Updates.Count
Write-Verbose "Found $Count update\s!"  
#Cache the count to make the For loop run faster
For ($i=0; $i -lt $Count; $i++) {
#Create object holding update
$Update = $searchresult.Updates.Item($i)
[pscustomobject]@{
Title = $Update.Title
KB = $($Update.KBArticleIDs)
SecurityBulletin = $($Update.SecurityBulletinIDs)
MsrcSeverity = $Update.MsrcSeverity
IsDownloaded = $Update.IsDownloaded
Url = $Update.MoreInfoUrls
Categories = ($Update.Categories | Select-Object -ExpandProperty Name)
BundledUpdates = @($Update.BundledUpdates)|ForEach{
[pscustomobject]@{
Title = $_.Title
DownloadUrl = @($_.DownloadContents).DownloadUrl
}
}
}
}
}

$updates |ft kb,title,msrcseverity,url -autosize

Exception calling "CreateInstance" with "1" argument(s): "Retrieving the COM class factory for remote component with CLSID {4CB43D7F-7EEE-4906-8698-60DA1C38F2FE} from machine <server-ip>  
failed due to the following error: 80070005 <server-ip>."  
At line:2 char:1
+ $updatesession = [activator]::CreateInstance([type]::GetTypeFromProgI ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) , MethodInvocationException
    + FullyQualifiedErrorId : UnauthorizedAccessException
 
3

KB      Title                                                                                            MsrcSeverity Url               
--      -----                                                                                            ------------ ---               
4598243 2021-01 Cumulative Update for Windows Server 2016 for x64-based Systems (KB4598243)              Critical     System.__ComObject
4535680 Security Update for Windows Server 2016 for x64-based Systems (KB4535680)                        Important    System.__ComObject
2267602 Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.329.2219.0)              System.__ComObject