Leveraging the Azure Arc Key Vault Extension

This article has not been completed yet. However, it may already contain helpful Information and therefore it has been published at this stage.

Prerequisites:

An operational Azure Key Vault
An imported certificate
The right permissions
An Azure Arc enabled server

Links that might be useful in this case:

Architectural outline:

# PSVersion Check - at least Version 5.1 required
$PSVersionTable

# Installing  the Azure Connected Machine PowerShell module
Install-Module Az.ConnectedMachine

# Security Protocol Check
[Net.ServicePointManager]::SecurityProtocol

# Modifying the Security Protocol Settings
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

# Installing  the Azure Connected Machine PowerShell module
Install-Module Az.ConnectedMachine

# Alternatively, you can install the entire module
Install-Module -Name Az -AllowClobber -Scope AllUsers

# Importing the newly installed module
Import-Module Az.ConnectedMachine

# Checking Net Framework Version
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse | Get-ItemProperty -Name version -EA 0 | Where { $_.PSChildName -Match '^(?!S)\p{L}'} | Select PSChildName, version

If you need to install "Chocolatey" follow this Link

# Installing NET Framework (latest Version)
choco install dotnetfx -y -f

......

Permission Setup:

Grant the Arc enabled server the Key Vault Secrets User role in Access control (IAM) for the vault

Deploy the Azure Arc Key Vaultextension

# Connecting to Azure
Connect-AzAccount -UseDeviceAuthentication

$Settings = @{
  secretsManagementSettings = @{
    observedCertificates = @(
      "https://YOURVAULTNAME.vault.azure.net/secrets/YOURCERTIFICATENAME"
      # Add more here in a comma separated list
    )
    certificateStoreLocation = "LocalMachine"
    certificateStoreName = "My"
    pollingIntervalInS = "3600" # every hour
  }
  authenticationSettings = @{
    # Don't change this line, it's required for Arc enabled servers
    msiEndpoint = "http://localhost:40342/metadata/identity"
  }
}

$ResourceGroup = "ARC_SERVER_RG_NAME"
$ArcMachineName = "ARC_SERVER_NAME"
$Location = "ARC_SERVER_LOCATION (e.g. eastus2)"
$SubID = "Subscription ID "

New-AzConnectedMachineExtension -SubscriptionId $SubID  -ResourceGroupName $ResourceGroup -MachineName $ArcMachineName -Name "KeyVaultForWindows" -Location $Location -Publisher "Microsoft.Azure.KeyVault" -ExtensionType "KeyVaultForWindows" -Setting (ConvertTo-Json $Settings)