PST per Script erzeugen lassen

# ===========================
# Backup Default Outlook Store to PST
# ===========================
# backup pst file
$backupfile = "U:\backup_${env:Username}_$(get-date -F yyyyMMdd_HHmm).pst"  
# ------------------------------------------------------
$ErrorActionPreference = 'Stop'  
if (Test-Path $backupfile){
    write-error "Backup '$backupfile' already exists! Exit." -Category InvalidOperation  
    return
}
# Get Outlook COM-Object
try{
    $ol = [System.Runtime.InteropServices.Marshal]::GetActiveObject("Outlook.Application")  
}catch{
    $ol = New-Object -Com Outlook.Application
}
# add backup store
$ol.Session.AddStore($backupfile)
$destinationStore = $ol.Session.Stores | ? FilePath -eq $backupfile
if(!$destinationStore){
    Write-Error "Backupstore mount failed." -Category InvalidData  
    return
}
write-host "Starting backup to '$backupfile' ..." -F Cyan  
# copy folders to backup store
foreach($folder in $ol.Session.DefaultStore.GetRootFolder().Folders){
    try{
        write-host "Copying folder '$($folder.FolderPath)' ... " -F Green -NoNewline  
        [void]$folder.Copyto($destinationStore)
        write-host "Done" -F Green  
    }catch{
        write-host "Error: $($_.Exception.Message)" -F Red  
    }
}
# unmount store from session
$ol.Session.RemoveStore($destinationStore.GetRootFolder())
# cleanup
[void][System.Runtime.InteropServices.Marshal]::ReleaseComObject($folder)
[void][System.Runtime.InteropServices.Marshal]::ReleaseComObject($ol)
[gc]::Collect()
write-host "Backup done." -F Cyan