<# RebootAndWaitForServer

Beispiel für die Variablen:
    
    [string]$VMName = "SERVER-VM01"
    [System.Management.Automation.PSCredential] $tempCred = new-object -typename System.Management.Automation.PSCredential ("Domain\Admin", (ConvertTo-SecureString P@ssw0rd! -AsPlainText -Force))

Oder ggfs. die Variablen abfragen:

    $VMName = Read-Host "Bitte den Namen des virtuellen Computers eingeben"
    $tempCred = Get-Credential

#>

function RebootAndWaitForServer {
    param (
        [Parameter(Mandatory=$true)]
        [String]
        $VMName,

        [Parameter(Mandatory=$true)]
        [System.Management.Automation.PSCredential]
        $Credentials

    )
    $VM = Get-VM -Name $VMName
    If ($Vm.State -eq "Running") {
        Write-Host "[$($VMName)]:: Fahre Computer herunter" -ForegroundColor Yellow -NoNewline
        Invoke-Command -VMName $VMName -Credential $Credentials -ScriptBlock {
            Stop-Computer -Force -Confirm:$false
        }
        do {
            Write-Host "." -ForegroundColor Yellow -NoNewline
            Sleep -Seconds 5
        } until ($VM.State -eq "Off")
        Write-Host " -> Ok!" -ForegroundColor Yellow
    }
    If ($Vm.State -eq "Off") {
        Write-Host "[$($VMName)]:: Starte Computer neu" -ForegroundColor Yellow -NoNewline
        Start-VM -VM $VM
        do {
            Write-Host "." -ForegroundColor Yellow -NoNewline
            Sleep -Seconds 5
            $VMStatus = Get-VMIntegrationService -VM $VM | ? Id -match "84EAAE65-2F2E-45F5-9BB5-0E857DC8EB47"
        } until($VMStatus.PrimaryStatusDescription.ToUpper() -eq "OK" -and $VMStatus.SecondaryStatusDescription.ToUpper() -eq "OK")
        Write-Host " -> Ok!" -ForegroundColor Yellow
        Write-Host "[$($VMName)]:: Warte auf Winlogon.exe und LSM Dienst" -ForegroundColor Yellow -NoNewline
        Invoke-Command -VMName $VMName -Credential $Credentials -ScriptBlock {
            do {
                Write-Host "." -ForegroundColor Yellow -NoNewline
                Sleep -Seconds 5
                $Process = Get-Process | ? ProcessName -eq "winlogon" -ErrorAction SilentlyContinue
                $LSM = Get-Service LSM -ErrorAction SilentlyContinue
                if ($Process.ProcessName -eq "winlogon" -and $LSM.Status -eq "Running") {
                    $Winlogon = 1
                }
                else {
                    $Winlogon = 0
                }
            } until ($winlogon -eq 1)
        }
    }
    Write-Host " -> Ok!" -ForegroundColor Yellow
}

[string]$VMName = "SERVER-VM01"
[System.Management.Automation.PSCredential] $tempCred = new-object -typename System.Management.Automation.PSCredential ("Domain\Administrator", (ConvertTo-SecureString P@ssw0rd! -AsPlainText -Force))

RebootAndWaitForServer $VMName $tempCred