You have to use the ReconfigVM_Task method from the SDK for that.

$VMname = <VMname>
$vmImpl = Get-VM $VMname
$vm = $vmImpl | Get-View

$spec = new-object VMware.Vim.VirtualMachineConfigSpec

foreach($dev in $vm.Config.Hardware.Device){
  if($dev.DeviceInfo.Label -like "Serial Port*"){
	$temp = New-Object VMware.Vim.VirtualDeviceConfigSpec
	$temp.device = [http://VMware.Vim.VirtualDevice|http://VMware.Vim.VirtualDevice]$dev
	$temp.device.connectable.connected = $false
	$temp.device.connectable.StartConnected = $false
	$temp.operation = "edit"
	$spec.deviceChange += $temp
  }
}
$vm.ReconfigVM_Task($spec)

This changes all serial ports to "disconnected" and will also unselect "Connect at power on".

Many thanks for your answer!

But when I run this method I got the following error:

Method invocation failed because [http://System.Object[|http://System.Object[]] doesn't contain a method named 'ReconfigVM_Task'.

Any idea?

Thank you!!!

The forum SW has problems with square brackets.

Try the attached script.

I tried the attached script I only modified the first line of your script "$VMname = Get-VM"

What are the preconditions that I can use the "ReconfigVM_Task"? Have I to do something or should that script run on each VI3 with VC?

The error i got told me, that the method "ReconfigVM_Task" is unkown?!

Thank you!

How can I disconnect ALL VMs from the serial port?

I dont want to enter the VMs name

Any idea?

Many thanks

By placing a loop around the previous code.

Something like this

Get-VM | Get-View | %{
  $spec = new-object VMware.Vim.VirtualMachineConfigSpec
  foreach($dev in $_.Config.Hardware.Device){
    if($dev.DeviceInfo.Label -like "Serial Port*"){
	  $temp = New-Object VMware.Vim.VirtualDeviceConfigSpec
	  $temp.device = [http://VMware.Vim.VirtualDevice|http://VMware.Vim.VirtualDevice]$dev
	  $temp.device.connectable.connected = $false
	  $temp.device.connectable.StartConnected = $false
	  $temp.operation = "edit"
	  $spec.deviceChange += $temp
    }
  }
  $_.ReconfigVM_Task($spec)
  Remove-Variable $spec
}

Hi LucD,

Your script looks gr8, can you modify it so that the serial ports which output to a file on a datastore are modified so that they can be pointed to a new datastore? I need this code in order to migrate VMs off datastores which are to be decomed.

I've noticed that when I manually edit the VM settings, the new com files are created on the new datastores however the old ones are still present on the original datastore?

Thanks.

You can indeed use a similar method to change the Datastore location to which serial port will write.
But changing the destination this way, will not automatically remove the old file.
You will need to do that separately.