I'm having trouble modifying an existing instance - specifically clearing the value.
Leveraging the PowerShell code from this article: https://docs.microsoft.com/en-us/windows/configuration/kiosk-mdm-bridge, I have successfully applied an XML configuration
to the class MDM_AssignedAccess under root\cimv2\mdm\dmmap. Everything works as expected.
I now want to clear the XML configuration and revert my changes. The code in this article applies the XML:
$nameSpaceName="root\cimv2\mdm\dmmap"
$className="MDM_AssignedAccess"
$obj = Get-CimInstance -Namespace $namespaceName -ClassName $className
Add-Type -AssemblyName System.Web
$obj.Configuration = [System.Web.HttpUtility]::HtmlEncode(@"
<XML>
"@)
Set-CimInstance -CimInstance $obj
This article (under # Modify existing instance) indicates I can assign a new value and update the instance just I did initially.
https://docs.microsoft.com/en-us/windows/client-management/mdm/using-powershell-scripting-with-the-wmi-bridge-provider#configuring-per-device-policy-settings
However, when I attempt the following I get a generic error.
$nameSpaceName="root\cimv2\mdm\dmmap"
$className="MDM_AssignedAccess"
$obj = Get-CimInstance -Namespace $namespaceName -ClassName $className
$obj.Configuration = ''
Set-CimInstance -CimInstance $obj
The returned error is: Set-CimInstance : A general error occurred that is not covered by a more specific error code.
How do I go about clearing the Configuration property in this scenario?
