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I am unable to update an instance of the ds_computer WMI class within the rootdirectoryldap namespace using PowerShell.

However I am able to update the same instance using C#. Here is my working C# code:

        string computerName = Environment.GetEnvironmentVariable("ComputerName");



        var connectionOptions = new ConnectionOptions();

        connectionOptions.Impersonation = ImpersonationLevel.Impersonate;

        connectionOptions.Authentication = AuthenticationLevel.PacketPrivacy;

        connectionOptions.EnablePrivileges = true;

        connectionOptions.Timeout = new TimeSpan(0, 0, 0, 5, 0);



        var managementScope = new ManagementScope();

        managementScope.Path.Server = computerName;

        managementScope.Path.NamespacePath = @"ROOTdirectoryLDAP";

        managementScope.Options = connectionOptions;

        managementScope.Options.Context.Add("__ProviderArchitecture", 64);

        managementScope.Connect();



        var context = new ManagementNamedValueCollection();

        context.Add("__PUT_EXT_PROPERTIES", new string {"DS_displayName"});

        context.Add("__PUT_EXTENSIONS", true);

        context.Add("__PUT_EXT_CLIENT_REQUEST", true);



        var putOptions = new PutOptions();

        putOptions.Context = context;

        putOptions.UseAmendedQualifiers = false;

        putOptions.Type = PutType.UpdateOnly;



        string commandText = string.Format("SELECT * FROM ds_computer WHERE DS_name='{0}'", computerName);

        var managementObjectSearcher = new ManagementObjectSearcher(managementScope, new ObjectQuery(commandText));

        var managementObjectCollection = managementObjectSearcher.Get();

        var managementObject = managementObjectCollection.Cast<ManagementObject>().FirstOrDefault();

        managementObject.SetPropertyValue("DS_displayName", "cs-test");



        managementObject.Put(putOptions);

Translating this code to PowerShell yields the following result:

PS > $computerName = $env:COMPUTERNAME



PS > $connectionOptions = [System.Management.ConnectionOptions]::New()

PS > $connectionOptions.Impersonation = [System.Management.ImpersonationLevel]::Impersonate

PS > $connectionOptions.Authentication = [System.Management.AuthenticationLevel]::PacketPrivacy

PS > $connectionOptions.EnablePrivileges = $true

PS > $connectionOptions.Timeout = [System.TimeSpan]::New(0, 0, 0, 5, 0)



PS > $managementScope = [System.Management.ManagementScope]::New()

PS > $managementScope.Path.Server = $computerName

PS > $managementScope.Path.NamespacePath = "ROOTdirectoryLDAP"

PS > $managementScope.Options = $connectionOptions

PS > $managementScope.Options.Context.Add("__ProviderArchitecture", 64)

PS > $managementScope.Connect()



PS > $context = [System.Management.ManagementNamedValueCollection]::New()

PS > $context.Add("__PUT_EXT_PROPERTIES", @("DS_displayName"))

PS > $context.Add("__PUT_EXTENSIONS", $true)

PS > $context.Add("__PUT_EXT_CLIENT_REQUEST", $true)



PS > $putOptions = [System.Management.PutOptions]::New()

PS > $putOptions.Context = $context

PS > $putOptions.UseAmendedQualifiers = $false

PS > $putOptions.Type = [System.Management.PutType]::UpdateOnly



PS > $commandText = "SELECT * FROM ds_computer WHERE DS_name='$computerName'"

PS > $managementObjectSearcher = [System.Management.ManagementObjectSearcher]::New($managementScope, [System.Management.ObjectQuery]::New($commandText))

PS > $managementObjectCollection = $managementObjectSearcher.Get()

PS > $managementObject = [Linq.Enumerable]::FirstOrDefault([System.Management.ManagementObject]$managementObjectCollection)

PS > $managementObject.SetPropertyValue("DS_displayName", "ps-test")



PS > $managementObject.Put($putOptions)

Exception calling "Put" with "1" argument(s): "Value cannot be null.

Parameter name: pUnk"

At line:1 char:1

+ $managementObject.Put($putOptions)

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : NotSpecified: (:) , MethodInvocationException

    + FullyQualifiedErrorId : DotNetMethodException

Of course I would rather be able to simply use the provided cmdlets Get-WmiObject/Set-WmiInstance, but unfortunately this also fails with the following result:

PS > $managementObject = Get-WmiObject -Namespace "rootdirectoryldap" -Class "ds_computer" -Authentication PacketPrivacy -Impersonation Impersonate -EnableAllPrivileges -Filter "DS_name='$env:COMPUTERNAME'"

PS > Set-WmiInstance -InputObject $managementObject -PutType UpdateOnly -Arguments @{DS_displayName="cmdlet1-test"}

Set-WmiInstance : Generic failure

At line:1 char:1

+ Set-WmiInstance -InputObject $x -PutType UpdateOnly

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : InvalidOperation: (:) [Set-WmiInstance], ManagementException

    + FullyQualifiedErrorId : SetWMIManagementException,Microsoft.PowerShell.Commands.SetWmiInstance

I also tried using the Get-CimInstance/Set-CimInstance cmdlets and got the same incredibly helpful "Generic Failure" message:

PS > $cimInstance = Get-CimInstance -Namespace "ROOTdirectoryLDAP" -ClassName "ds_computer" -Filter "DS_name='$env:COMPUTERNAME'"

PS > Set-CimInstance -InputObject $cimInstance -Property @{DS_displayName="cmdlet2-test"}

Set-CimInstance : Generic failure

At line:1 char:1

+ Set-CimInstance -InputObject $x -Property @{DS_displayName="cmdlet2-test"} -P ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : NotSpecified: (ds_computer (AD...tyDomainPCG...):CimInstance) [Set-CimInstance], CimException

    + FullyQualifiedErrorId : HRESULT 0x80041001,Microsoft.Management.Infrastructure.CimCmdlets.SetCimInstanceCommand

I figured it out. The problem was with the array syntax that I was storing in $context["__PUT_EXT_PROPERTIES"]

This doesn't work:

$context.Add("__PUT_EXT_PROPERTIES", @("DS_displayName"))

While this works:

$context.Add("__PUT_EXT_PROPERTIES", [string]("DS_displayName"))

So, here is a fully working example for anyone else who may be struggling with this:

$context = [System.Management.ManagementNamedValueCollection]::New()

$context.Add("__PUT_EXT_PROPERTIES", [string]("DS_displayName"))

$context.Add("__PUT_EXTENSIONS", $true)

$context.Add("__PUT_EXT_CLIENT_REQUEST", $true)



$putOptions = [System.Management.PutOptions]::New()

$putOptions.Context = $context

$putOptions.UseAmendedQualifiers = $false

$putOptions.Type = [System.Management.PutType]::UpdateOnly



$managementObject = Get-WmiObject -Namespace "rootdirectoryldap" -Class "ds_computer" -Filter "DS_name='$env:COMPUTERNAME'"

$managementObject.DS_displayName = "cmdlet-test"

$managementObject.Put($putOptions)