Windows Server 2016 - Windowssicherungs-E-Mail-Benachrichtigung

<?xml version="1.0" encoding="UTF-16"?>  
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">  
  <RegistrationInfo>
    <Date>2015-02-09T10:26:10.9657415</Date>
    <Author>AUTHOR_NAME</Author>
  </RegistrationInfo>
  <Triggers>
    <EventTrigger>
      <Enabled>true</Enabled>
      <Subscription>&lt;QueryList&gt;&lt;Query Id="0" Path="Microsoft-Windows-Backup"&gt;&lt;Select Path="Microsoft-Windows-Backup"&gt;*[System[(Level=1  or Level=2 or Level=3 or Level=4 or Level=0 or Level=5) and (EventID=5 or EventID=8 or EventID=9 or EventID=17 or EventID=22 or EventID=49 or EventID=50 or EventID=52 or EventID=100 or EventID=517 or EventID=518 or EventID=521 or EventID=527 or EventID=528 or EventID=544 or EventID=545 or EventID=546 or EventID=561 or EventID=564 or EventID=612)]]&lt;/Select&gt;&lt;/Query&gt;&lt;/QueryList&gt;</Subscription>  
    </EventTrigger>
  </Triggers>
  <Principals>
    <Principal id="Author">  
      <UserId>USER_ID</UserId>
      <LogonType>Password</LogonType>
      <RunLevel>LeastPrivilege</RunLevel>
    </Principal>
  </Principals>
  <Settings>
    <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
    <DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
    <StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
    <AllowHardTerminate>true</AllowHardTerminate>
    <StartWhenAvailable>false</StartWhenAvailable>
    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
    <IdleSettings>
      <StopOnIdleEnd>true</StopOnIdleEnd>
      <RestartOnIdle>false</RestartOnIdle>
    </IdleSettings>
    <AllowStartOnDemand>true</AllowStartOnDemand>
    <Enabled>true</Enabled>
    <Hidden>false</Hidden>
    <RunOnlyIfIdle>false</RunOnlyIfIdle>
    <WakeToRun>false</WakeToRun>
    <ExecutionTimeLimit>P3D</ExecutionTimeLimit>
    <Priority>7</Priority>
  </Settings>
  <Actions Context="Author">  
    <Exec>
      <Command>C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe</Command>
      <Arguments>-ExecutionPolicy Unrestricted -InputFormat Text -File "C:\Admin\WSBSendMail.ps1"</Arguments>  
    </Exec>
  </Actions>
</Task>

Function currentDate {
	$currentDate = Get-Date -Format "yyyy-MM-dd HH:mm:ss"  
	return $currentDate
}

# Server name on which the script is running
$serverName = $env:computername

$mailBody = "Windows Server Backup auf " + $serverName + " ist am " + (currentDate) + " fehlgeschlagen."  

# Some variables for sending a email.
$emailFrom = "mailfrom@example.org"  
$emailTo = "mailto@example.org"  
$emailSubject = "[FAILURE] Windows Server Backup failed on " + $serverName + " at " + (currentDate)  
$emailSmtpServer = "SMTP_SERVER"  

Send-MailMessage -From $emailFrom -Subject $emailSubject -To $emailTo -Body $mailBody -SmtpServer $emailSmtpServer