Azure Devops - Issue while Extracting the Secret Value of the Key-Vault

I am getting the below Issue the Secret of the Key-Vault is coming as *** but after Base64 encoding it shows correct encoded-value.

But in Azure Devops PowerShell was facing issue while decoding the Encoded Base64 Key-Vault value.

1. Then in PowerShell Script, to extract the Key-Vault values with the below command

$keyVaultValue = (Get-AzKeyVaultSecret -VaultName "xxx" -Name "DBPass")

Write-Host "Value of Value": $keyVaultValue

---- Output

Value of keyVaultValue : ***

After Encoding in Base64 for the above value of (keyVaultValue) getting the correct encoded-value. Checked in the base64 decode website (https://www.base64decode.org/) by encoded-value to check the decoded-value. ( Decoded-value is correct)

Encoded-Value

$encodedSecret = [Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($keyVaultValue))

Write-Host "Value of encodedSecret" $encodedSecret

---Output - for-example

Value of encodedSecret - xyz

Decoded-value

$decodedvalue = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('xyz'))

Write-Host "Value of DecodedSecret" $decodedvalue

---- Output

Value of decodedvalue : ***