Re: Using Powercli I having trouble modifying vm hardware and nic portgroup when deploying from template

I think the way you are doing the customisation part is not the way it should be done.

First you adapt the OSCustomizationSpec like you defined in the CSV row

Get-OSCustomizationSpec $_.Customization | Set-OSCustomizationSpec -MemoryMB $_.MemoryMB -NumCpu $_.NumCpu -Confirm:$false

Then you apply the OSCustomizationSpec to the VM

Set-VM $"Server Name"-OSCustomizationSpec $_.Customization

If you don't want to change your OSCustomizationSpec all the time, you can work with a non-presistent one.