Set Azure VM License Type Windows_Client

This script will help update licenses on all your Azure VMs, output to csv and has the option to exclude specific virtual machine names. For my VMS I needed to make sure they are always using Windows_Client. You can run this with any automation software (Azure Automation, Github Actions, DevOps, FunctionApp) to make sure your VMs are licensed correctly.

$allSubscriptons = Get-AzSubscription
$vmDetails = foreach ($subscription in $allSubscriptons) {
    $temp = Set-AzContext -Subscription $subscription.Name
    $allResourceGroups = Get-AzResourceGroup

    foreach ($rg in $allResourceGroups) {
        $vms = Get-AzVM -ResourceGroupName $($rg.ResourceGroupName) | Select Name, LicenseType, ResourceGroupName, Tags

        if ($vms) {
            foreach ($vm in $vms) {
                # Skip VMs with names 'AVDVM1' and 'AVDVM2'
                if($vm.Name -eq 'AVDVM1' -or $vm.Name -eq 'AVDVM2') {
                    continue
                }

                [PSCustomObject]@{
                    vmName = $vm.Name
                    vmRG = $vm.ResourceGroupName
                    vmSub = $subscription.Name
                    vmLicense = $vm.LicenseType
                }
            }
        }
    }
}

$vmDetails | Export-Csv -Path "C:\Temp\VMLicenses.csv" -NoTypeInformation
$vmDetails | Write-Output
$selectedVMs = $vmDetails | Out-GridView -PassThru

$licenseSet = "Windows_Client"

forEach ($vm in $selectedVMs) {
    $null = Set-AzContext -Subscription $vm.vmSub
    $tempVM = Get-AzVm -ResourceGroupName $vm.vmRG -Name $vm.vmName

    # Only update if LicenseType is null. Remove -Whatif when ready.
    if ($null -eq $tempVM.LicenseType) {
        Write-Host "Setting $($vm.vmName) to $licenseSet" -ForegroundColor Green
        $tempVM.LicenseType = $licenseSet
        Update-AzVM -ResourceGroupName $vm.vmRG -VM $tempVM -WhatIf
    }
}

If you don't need a CSV and want to just update any VMs with missing license you can use or modify this script below.

#Updates virtual machine license on 1 subscription only.
$subscriptionName = "Subname"
$licenseSet = "Windows_Client"

# Set the context to the specified subscription
Set-AzContext -SubscriptionName $subscriptionName

$allResourceGroups = Get-AzResourceGroup

#Iterate over all resource groups in the current subscription
foreach ($rg in $allResourceGroups) {
    $vms = Get-AzVM -ResourceGroupName $rg.ResourceGroupName

    #Iterate over all VMs in the current resource group
    foreach ($vm in $vms) {
        # Skip VMs with names 'AVD002' and 'AVD001'
        if($vm.Name -eq 'AVD002' -or $vm.Name -eq 'AVD001') {
            continue
        }

        # Only work on VMs where LicenseType is null or not Windows_Client
        if($null -eq $vm.LicenseType -or "Windows_Client" -ne $vm.LicenseType) {
            Write-Host "VM $($vm.Name) in resource group $($rg.ResourceGroupName) has no LicenseType set or LicenseType is not Windows_Client" -ForegroundColor Yellow
                
            # Uncomment the next two lines if you want to set the LicenseType and update the VM
            # $vm.LicenseType = $licenseSet
            # Update-AzVM -ResourceGroupName $rg.ResourceGroupName -VM $vm -NoWait
        }
    }
}

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