$vms = Get-VMReplication
$elaspedsec = 0
if ($vms -eq $null) {
  return 0
} else {
  foreach ($vm in $vms) {
    $tempsec = ((Get-Date) - (Get-Date($vm.LastReplicationTime))).TotalSeconds
    if ($elaspedsec -lt $tempsec) {
      $elaspedsec = [int]$tempsec
    }
  }
  return $elaspedsec
}