How to Run ScanPST.exe on Outlook (Step-by-Step Guide)

If your Outlook data file becomes corrupted or Outlook starts showing errors, you may need to run ScanPST.exe on Outlook. ScanPST.exe is the built-in Microsoft Inbox Repair Tool that helps repair corrupted Outlook PST files.

PST files store emails, contacts, calendars, and other mailbox data. When these files become damaged, Outlook may fail to open or may show errors. This guide explains how to run ScanPST.exe to repair Outlook data files.

What Is ScanPST.exe?

ScanPST.exe is the Inbox Repair Tool included with Microsoft Outlook. It scans Outlook data files and fixes errors that may prevent Outlook from working properly.

The tool is used to repair:

• Corrupted PST files
• Missing Outlook folders
• Email synchronization errors
• Outlook startup problems

Running the tool can often restore normal Outlook functionality.

When You Should Run ScanPST.exe

You may need to run ScanPST.exe if Outlook shows errors such as:

• Outlook cannot start
• Outlook data file cannot be opened
• Emails missing from folders
• Frequent Outlook crashes

These issues may indicate PST file corruption.

Locate ScanPST.exe on Your Computer

The ScanPST.exe file is installed with Microsoft Outlook.

Typical locations include:

For Outlook 2019 / Outlook 2021 / Microsoft 365:

C:\Program Files\Microsoft Office\root\Office16

For older versions of Outlook:

C:\Program Files\Microsoft Office\OfficeXX

The exact folder depends on your Outlook version.

How to Run ScanPST.exe on Outlook

Follow these steps to repair your Outlook data file.

1: Close Microsoft Outlook

Before running the repair tool, ensure Outlook is completely closed.

2: Open ScanPST.exe

1. Navigate to the folder containing ScanPST.exe.
2. Double-click the file to launch the tool.

The Inbox Repair Tool window will open.

3: Select the PST File

1. Click Browse.
2. Locate the Outlook PST file you want to repair.

The PST file is usually located in:

Documents\Outlook Files

4: Start the Scan

1. Click Start.
2. The tool will scan the PST file for errors.

The scan may take several minutes depending on the file size.

5: Repair the File

If errors are detected:

1. Click Repair.
2. Wait for the repair process to complete.

Restart Outlook

After the repair process finishes:

1. Open Microsoft Outlook again.
2. Check whether the issue has been resolved.

Your emails and folders should now be accessible.

Tips to Prevent PST File Corruption

To reduce the risk of Outlook data file corruption:

• Keep Outlook updated
• Avoid abrupt shutdowns while Outlook is running
• Regularly back up PST files
• Keep PST files from becoming excessively large

These practices help maintain stable Outlook performance.

Final Thoughts

Knowing how to run ScanPST.exe on Outlook is useful when Outlook data files become corrupted. The Inbox Repair Tool can quickly scan and repair PST files, restoring access to emails, contacts, and calendar data.

If Outlook starts showing errors or fails to open properly, running ScanPST.exe is often the first step in resolving the problem.

FAQs

What does ScanPST.exe do?

It scans and repairs corrupted Outlook PST files.

Where is ScanPST.exe located?

It is located in the Microsoft Office installation folder.

Will ScanPST delete my emails?

No. The tool repairs the PST file and may create a backup before making changes.

When should I run ScanPST?

You should run it when Outlook shows data file errors or fails to open.