Learn Way to Convert OST to PST for Free using PowerShell Scripts

Welcome
1

To convert OST to PST using a PowerShell Script, you must automate Microsoft Outlook because the OST format can only be accessed through Outlook’s MAPI interface. PowerShell will control Outlook to create a PST and copy mailbox folders into it.
Steps to convert the OST file to PST with PowerShell

Step 1 Open PowerShell

  1. Press Start
  2. Search PowerShell
  3. Click Run as Administrator

Step 2 Create the PowerShell script

Copy the following script and save it as:

# Start Outlook
$outlook = New-Object -ComObject Outlook.Application
$namespace = $outlook.GetNamespace("MAPI")
$namespace.Logon()

# PST file path
$pstPath = "C:\Temp\export.pst"

# Create PST store
$namespace.AddStore($pstPath)

# Get mailbox
$mailbox = $namespace.Folders.Item(1)

# Get new PST folder
$pstStore = $namespace.Folders | Where-Object {
    $_.Store.FilePath -eq $pstPath
}

# Copy folders
foreach ($folder in $mailbox.Folders) {
    $folder.CopyTo($pstStore)
}

Write-Host "OST exported to PST successfully"

Step 3 Allow script execution

Run Command

Set-ExecutionPolicy RemoteSigned

Step 4 Run the script
Now, navigate to the folder with script

cd C:\Scripts

.\convert-ost-pst.ps1

Step 5: Locate PST file

C:\Temp\export.pst

With the following this steps you can convert OST files to PST with PowerShell Script. But if the OST files is orphaned, inaccessible, corrupted, you utilize dedicated tools like Softaken OST to PST Converter Software.
With the use of this application you can easily convert OST files.
Steps

  1. Install and Run
  2. Browse and Add OST file
  3. Take Preview of OST file
  4. Choose PST file format
  5. Select desired location
  6. Start convert process

I hope you learn how to convert OST to PST with PowerShell.

2

However, PowerShell is not a practical option to convert OST to PST. It does not provide a direct way to recover or convert inaccessible OST files, and setting up custom scripts can be confusing. I checked it out first, but ended up using the TrustVare OST to PST Converter. No Outlook needed. Worked on my orphaned OST file and converted everything – emails and attachments – into a PST file in a few simple steps. This is a much better choice if you want something simpler and more dependable.

3

Are you looking for manual solution for OST to PST Conversion using Powershell.

Watch my video: https://www.youtube.com/watch?v=XEiSTbat-c8

4

If you’re looking to convert an OST file to PST for free using PowerShell, it’s important to know that PowerShell doesn’t provide any native cmdlet or script to directly convert OST files into PST format. While PowerShell is useful for managing Exchange or Microsoft 365 environments, it cannot recover or convert orphaned, inaccessible, or offline OST files into PST. Creating custom scripts for this purpose is also complex and generally won’t work unless the mailbox is still connected and accessible through Outlook or Exchange.

I looked into the PowerShell approach first, but it wasn’t a practical solution for OST to PST conversion. Instead, I used MailsDaddy OST to PST Converter, and it made the process much easier. The software doesn’t require Outlook or an Exchange connection and can convert healthy, orphaned, encrypted, inaccessible, and even corrupted OST files directly to PST. It preserved all my emails, attachments, contacts, calendars, tasks, and folder structure without any data loss. The interface is straightforward: just load the OST file, preview the mailbox, choose PST as the output format, and start the conversion. If you need a simple, reliable, and hassle-free way to convert an OST file to PST, this is a much better option than trying to build or troubleshoot PowerShell scripts.