Update_VM.ps1

Param($ResourceGroupName, $VMName)
#Start Logging
    Write-Output "Starting Powershell update $((get-date).AddHours(12))" 

$vm = Get-AzVM -ResourceGroupName $ResourceGroupName -Name $VMName
$vm.LicenseType = 'Windows_Server'

Write-Output "Target VM: $($Vm.Name)"

$tags = (Get-AzResource -ResourceId $vm.id).Tags
    if (-not($tags.ContainsKey('Created by')))
       {Write-Output "Searching Activity log for Creator..." 
        
            $tags.'Created by'=(((Get-AzActivityLog -ResourceId $vm.Id |where-object{$_.OperationName.Value -eq 'Microsoft.Compute/virtualMachines/write' -and $_.SubStatus.value -eq 'Created'} ) | select -first 1).Caller -split '@' )[0]
            $tags.'Remediated'=((get-date).AddHours(12))
}
#Update resources
Update-AzVM -VM $vm -ResourceGroupName $ResourceGroupName
Update-AzTag -ResourceId $vm.id -Tag $tags -Operation Merge

Write-Output "...Deployment Script complete...$((get-date).AddHours(12))"