PowerShell Workflow bulk start virtual machines in Azure

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workflow Bulk-Start
{
    Param
    (
        [Parameter(Mandatory=$true)]
        [string[]]$VMs
    )

    #Connect to Azure Account via Azure user account
    $Cred = Get-AutomationPSCredential -Name {Azure Account}    
    Add-AzureAccount -Credential $Cred    
    #Select specific subscription within your account    
    Select-AzureSubscription -SubscriptionName {subscription}  
    
    foreach ($V in $VMs)
    {
        $VM = Get-AzureVM –ServiceName 'SDDSC-DEMO' -Name $V
        if ($VM.PowerState -eq "Started")
  {
   # The VM is already started, so send notice
   Write-Output ($VM.InstanceName + " is already running")
  }
  else
  {
   # The VM needs to be started
         $StartRtn = Start-AzureVM -Name $VM.Name -ServiceName $VM.ServiceName -ErrorAction Continue

         if ($StartRtn.OperationStatus -ne 'Succeeded')
         {
    # The VM failed to start, so send notice
                Write-Output ($VM.InstanceName + " failed to start")
         }
   else
   {
    # The VM started, so send notice
    Write-Output ($VM.InstanceName + " has been started")
   }
  }
    }
}

1

Bulk-Start -VMs dsc-demo001, dsc-svr001