Powershell script for stopping Azure VMs on a schedule in an Azure Automation runbook

Stop-AzureVMsOnSchedule

workflow Stop-AzureVMsOnSchedule {
    param(
    	# The name of the VM(s) to start on schedule.  Can be wildcard pattern.
    	[Parameter(Mandatory = $true)] 
    	[string]$VMName,
	
    	# The service name that $VMName belongs to.
    	[Parameter(Mandatory = $true)] 
    	[string]$ServiceName,
	
    	# The name of the subscription.
    	[Parameter(Mandatory = $true)] 
    	[string]$SubName,
        
        # The name of the OrgCredUser.
    	[Parameter(Mandatory = $true)] 
    	[string]$PsUserName
	)
    
	# Specify Azure Subscription Name
    $Cred = Get-AutomationPSCredential -Name $PsUserName

    # Connect to Azure
    Add-AzureAccount -Credential $Cred
    
	Select-AzureSubscription -SubscriptionName $SubName

	$vm = Get-AzureVM -ServiceName $ServiceName -Name $VMName
    Stop-AzureVM -ServiceName $vm.ServiceName -Name $vm.Name -Force
}