PowerShell ADSI query leads to 0x80020006 (DISP_E_UNKNOWNNAME))"

The query for some AD users TS Home Directory below, leads to an DotNetException. What is wrong with my code? And what is this exception trying to tell me?

$userObject = Get-ADUser someUser -Properties *
$userObject.userParameters

$adsiObject = [adsi]"LDAP://$($userObject.DistinguishedName)"
$adsiObject.PSBase.InvokeGet("TerminalServicesHomeDirectory"); 

Output:

                                                PCtxCfgPresent㔵攱戰ぢCtxCfgFlags1〰て〲〹CtxCallback〰〰〰〰CtxShadow㌰〰〰〰(CtxMaxConnectionTime〰〰〰〰.CtxMaxDisconnectionTime〰〰〰〰CtxMaxIdleTime〰〰〰〰"CtxKeyboardLayout〰〰〰〰*CtxMinEncryptionLevel
㄰ CtxWorkDirectory〰 CtxNWLogonServer〰CtxWFHomeDir〰"CtxWFHomeDirDrive〰 CtxWFProfilePath〰"CtxInitialProgram〰"CtxCallbackNumber〰

Exception calling "InvokeGet" with "1" argument(s): "Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME))"
At D:\SourceCode\PowerShell\Get-ADTSProperties.ps1:125 char:1
+ $adsiObject.PSBase.InvokeGet("TerminalServicesHomeDirectory");
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodException

So the attribute userParameters is there and holds data.

I figured it out by myself. The library tsuserex.dll was not registered which provides exports to read the userParameters BLOB.

How to read msTSProfilePath, msTSHomeDrive and msTSHomeDirectory properties from AD (VB.NET)