How do I Repair a corrupt OST file?

OST file is known as Offline Storage Table, which is used to compose emails, read existing emails, delete emails, set reminders, and many more in offline mode. And all the changes made to the OST file will be synced to the Exchange Server once the internet connectivity is accessible.

No matter how useful the OST file, it is vulnerable to corruption. Virus infection, improper termination of Outlook, power surge issues, etc. can cause corruption to the OST file. Don’t be worried if your OST file is corrupt or inaccessible. Let’s dive into repair OST file using the highly rated methods stated in this article.

How to Repair OST file | (2019, 2016, 2013, 2010, 2007)

Below are the 3 most successful methods to repair corrupt OST file. 

1. In-built repair tool (scanpst)

2. Recreating OST file technique

3. Remo Convert OST to PST tool

If you are directly looking for a solution to repair OST file using a reliable tool like Remo, then it is recommended to watch this video to know more.

Method 1: Repair Corrupt OST file using Outlook OST Repair tool

Repair corrupt OST file using the Scanost.exe tool if you are using Microsoft Outlook 2003 or 2002. Follow the below instructions to Open Scanost.exe tool

(Drive:\Program Files\Microsoft Office\Office_version)

Outlook 2000 C:Program Files\Common Files\System\MAPINT\scanost.exe
Outlook 2002 C:Program Files\Common Files\System\MAPI\scanost.exe
Outlook 2003 C:Program Files\Common Files\System\MSMAPI\scanost.exe

Note: After you open the Scanost.exe tool in your Windows computer, start with the same below steps as Scanpst.exe tool to repair OST file

Steps to Repair corrupt OST file using SCANPST tool

Repair corrupt OST file using the Scanpst.exe tool, which is known as the Outlook Inbox Repair tool if you are using Outlook 2007, 2013, 2016, or 2019. 

  1. Locate and Open Scanpst.exe tool by utilizing the following path in your respective Outlook version:
    In Outlook 2019 C:\Program Files\Microsoft Office\root\Office16\
    In Outlook 2016 C:\Program Files\Microsoft Office\Office16
    In Outlook 2013 C:\Program Files\Microsoft Office\Office15
    In Outlook 2010 C:\Program Files\Microsoft Office\Office14
    In Outlook 2007 C:\Program Files (x86)\Microsoft Office\Office12

    repair corrupt or damaged OST file

  1. Click the Browse button to select a corrupt OST file or Outlook Data File which you want to repair and then, hit the Start button.
    select corrupt OST file to repair
  2. Finally, Check or Tick Make a backup of scanned file before repairing option and hit the Repair button.

After the Outlook OST file repairing process completes, you can open Microsoft Outlook to access your OST file data such as emails, contacts, notes, etc. But, in some cases, you might need to perform some additional steps after repairing OST file to recover emails, contacts, and other Outlook items.

Steps to recover missing folders after performing the above method:

Recovered Personal Folders or Lost and Found folder is created once the SCANPST tool repairs your corrupt OST file. The folder includes all your missing Outlook items such as emails, notes, etc. The main disadvantage of repairing your OST file using the scanpst.exe tool is that it cannot place the recovered Outlook items in its original folder structure. Follow the manual steps to recover Outlook folders or items from the Lost and Found folder to its original location.

  1. In the Folder pane, open the Recovered Personal Folders and Lost and Found folder.
  2. Select the Outlook folder or items you want to recover from it.
  3. Drag and drop the Outlook items into the original folders.

Now, you can delete the empty or unwanted folders created after repairing the OST file.

In case, if this method cannot fix OST file corruption then, head over to the next method as this can be due to severe OST file corruption.

Method 2: Fix OST file by Deleting and Recreating

Note: This method might lead to a data loss scenario if there is no proper synchronization exists between the Exchange server and the OST file. Hence, it is suggested to take a backup of your corrupt OST file before trying this method.

The technique of deleting and recreating the corrupt OST file can help you fix certain OST file errors due to corruption or damage and thereby you can access all your Outlook data. 

Steps to Delete and Recreate OST file

  1. Click Windows+R keys.
  2. Now, in the Open box option, Type or Paste %localappdata%\Microsoft\outlook and click OK.
    delete and recreate OST file to repair it

  3. This will locate all your available OST files on your Windows computer. Right-click on corrupt OST file and select Delete option.
  4. Now, open Microsoft Outlook to recreate a working OST file. 

In this way, you can recreate your OST file to fix OST file corruption and can access Outlook data. However, this method cannot restore Outlook folders or items like emails composed in offline mode if it was not synced with the Exchange server.

If your OST file is still corrupt even after performing the above methods. Then, the only proven way to fix OST file without any risk is to convert it to the PST file format using Remo Convert OST to PST software and thus you can recover all your Outlook items including the folder structure and rules.

Method 3: Repair OST file using Remo Convert OST to PST tool

Converting OST file to PST file format helps you recover all your OST file data such as emails, contacts, notes, and other Outlook items from the corrupt or inaccessible OST file. 

Remo Convert OST to PST software works with the advanced scanning technique to convert corrupt OST file into healthy PST file. And thus, it makes all Outlook items easily accessible and you can even transfer Outlook to new computer

Recover emails, contacts, calendar, attachments, notes, etc. including Outlook folder structure and rules by safely converting corrupt OST file to PST file using Remo tool!
download now to Recover Files from External Hard drive

Steps to convert OST file to PST file

  1. Download and install Remo Convert OST to PST software on your computer to repair Outlook OST file.
    repair OST file
  2. Click on the Find OST File button, this will automatically locate all available OST files. select the corrupt OST that needs to be repaired, and click Next.
  3. Now, click the Browse button to select the destination of your choice to save the converted OST file and then, click the Convert option.
    select destination for repaired ost file
  4. Finally, click the Finish button.

After you perform the above steps, the corrupt OST file will be converted into the PST file format. Now, you can easily import this PST file to access your Outlook data.


By making use of the in-built repair tool, you can fix minor OST file corruption. In cases, where the severity of corruption is high, make use of the Remo Convert OST to PST software to safely convert the corrupt OST file to PST format and access all your OST file data.

How do I Repair a corrupt OST file? was last modified: June 18th, 2021 by Tony Landry

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