workflow Start-ITCampManagementVMs
{
    Param (
        # Name of the target Azure subscription.
        [Parameter(Mandatory=$True)]
        [String]$SubscriptionName = "MSFT IT Camp Stage",
        [Parameter(Mandatory=$False)]
        [String]$AdminUsername = "adm_camp",
        [Parameter(Mandatory=$False)]
        [String]$AdminPassword = "Azureisttoll!",
        [Parameter(Mandatory=$False)]
        [String]$Location = "West Europe",  # Get-AzureLocation
        [Parameter(Mandatory=$True)]
        [Int]$NumberOfVMs = 30,
        [Parameter(Mandatory=$False)]
        [String]$NamePrefix = "itc0202"
    )

    # Get the Azure connection asset that is stored in the Automation service based on the name that was passed into the runbook
    $AzureConn = Get-AutomationConnection -Name $SubscriptionName
    # Get the Azure management certificate that is used to connect to this subscription
    $Certificate = Get-AutomationCertificate -Name $AzureConn.AutomationCertificateName
    # Set the Azure subscription configuration
    Set-AzureSubscription -SubscriptionName $SubscriptionName -SubscriptionId $AzureConn.SubscriptionID -Certificate $Certificate
    # Select the Azure subscription.
    Select-AzureSubscription -SubscriptionName $SubscriptionName

    # Pre-configured images
    # Get latest image for Windows Server 2012 R2.
    $imageName = Get-AzureVMImage |
        Where-Object -Property ImageFamily -eq "Windows Server 2012 R2 Datacenter" |
        Sort-Object -Property PublishedDate -Descending |
        Select-Object -ExpandProperty ImageName -First 1

    $randomPart = "{0:ffff}" -f $(Get-Date)

    # Create account names.
    $instanceNames = InlineScript {
        $instanceNames = @()
        $prefix = $Using:NamePrefix

        # Create a short prefix, because the host name cannot longer than 15 characters.
        $shortPrefix = $prefix.Substring(0, ([System.Math]::Min($prefix.Length,12)))
        for ($i = 0; $i -lt $Using:NumberOfVMs; $i++) {
            $counter = "{0:00}" -f $i

            # Create a host name and a DNS safe name for the lcoud service and storage account.
            $instanceNames += @{HostName = "$shortPrefix-$counter";
                                DnsSafe = "$prefix$Using:randomPart$counter"}
        }
        $instanceNames
    }

    Checkpoint-Workflow

    foreach ($instance in $instanceNames) {
        Write-Warning "Instance.DnsSafe: $($instance.DnsSafe)"
        Write-Warning "Instance.HostName: $($instance.HostName)"

        New-AzureStorageAccount -Location $Location -StorageAccountName $instance.DnsSafe -Type Standard_LRS

        Checkpoint-Workflow

        Set-AzureSubscription -SubscriptionName $SubscriptionName -CurrentStorageAccountName $instance.DnsSafe

        New-AzureQuickVM -ImageName $imageName -ServiceName $instance.DnsSafe -Windows -AdminUsername $AdminUsername -InstanceSize Basic_A2 -Location $Location -Name $instance.HostName -Password $AdminPassword

        Checkpoint-Workflow
    }
}