how to use store azure vault in powershell script for getting PS Credentail arugment

Question

Hello ,I am working to rename the computer for that I am using store azure vault secret to store password then retrieving and will use this value to pass as argument to rename-computer commands but I am not able to implement .below is code.

$newname =(get-CIMInstance -Classname win32_bios).serialnumber
$password =Get-AzKeyVaultSecret -VaultName "hybridautopilotkey" -Name "Administrator" -AsPlainText
Write-Host $password #just to see ..its working
$Cred = New-Object System.Management.Automation.PSCredential ("rklab\Administrator", $password)
Rename-Computer -ComputerName "localhost" -NewName $newname -DomainCredential $Cred -Force

but it didn't work ..maybe this is not right way to pass as argument .
how to rename-computer using credential stored azure vault secret key

error was
Cannot find an overload for "PSCredential" and the argument count: "2".
At line:3 char:9

• $Cred = New-Object System.Management.Automation.PSCredential ("rklab\ ...
• ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• CategoryInfo : InvalidOperation: (:) [New-Object], MethodException
• FullyQualifiedErrorId : ConstructorInvokedThrowException,Microsoft.PowerShell.Commands.NewObjectCommand

thanks
rich

Answer 1

@Richkm
Thank you for following up on this!

I tested your script in my tenant to confirm that the Secret was being retrieved correctly and found that you might have to use ConvertFrom-SecureString -AsPlainText or $SecretDetail.SecretValueText within the $Cred parameter. Since you're using the same secret as $password, you can also try replacing $SecretDetail.SecretValue with $password.

$Cred = New-Object System.Management.Automation.PSCredential ("******@testoutlook.onmicrosoft.com", $SecretDetail.SecretValue)

Findings:

#Get-AzKeyVaultSecret works as expected showing the Secret was retrieved successfully.  
$password =Get-AzKeyVaultSecret -VaultName "jtranKeyVault" -Name "testSecret" -AsPlainText  
Write-Host $password  

#The SecretDetail parameter is retrieving the ...PSKeyVaultSecret value, that isn't in PlainText and is Null.  
$SecretDetail = Get-AzKeyVaultSecret -VaultName "jtranKeyVault" -Name "testSecret"   
Write-Host $SecretDetail  
Write-Host $SecretDetail.SecretValueText  

Since $SecretDetail is Null, $Cred is possibly failing to login which could be why you're receiving the "Access is denied" error referencing the Rename-Computer command.

If you have any other questions or are still having issues with this, please let me know.
Thank you for your time and patience throughout this issue.

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