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How to Repair Corrupt Outlook .ost File and Get Back Damaged Data

“Being an Exchange connected Outlook user, I am in big trouble now. The OST files of my Outlook became corrupt. Therefore, I find some files missing from Outlook at times and those emails are back when connected to Exchange. I want to solve this permanently. Please tell me how to repair corrupt Outlook .ost file without losing any data. I will be ever grateful. Thanks!”

Repair Corrupt Outlook .ost File

The complete contents of Exchange connected MS Outlook account get saved locally in the form of OST file. Though there is another copy of the same data stored in the Exchange Server, OST file corruption can cause a lot of problems to its users. Therefore, if you are getting some errors in Outlook or it is malfunctioning, damaged OST file might be the cause. 

In that case, the option you have is to repair the damage. Now the question is how to repair damaged OST file. To know its answer, you have to go on reading this blog as we will be telling you some techniques to fix this corruption.

Symptoms of Outlook OST File Corruption Issue 

If you are facing any of these issues, your OST file may be corrupt.

  • Missing mailbox items during offline mode
  • The difference in messages when toggled between online and offline mode
  • Error message while trying to synchronize with MS Exchange Server
  • Various annoying issues with Outlook that vanishes upon disabling cache mode

Reason for OST File Corruption Problem 

OST file of your Outlook profile may get corrupt due to a number of reasons.

  • Virus Attack: Virus and malware can attack your system and affect your OST file badly, causing it to become damaged. Due to the issues of OST file corruption, various users wants to know How to Repair Corrupt Outlook .ost file.
  • Improper Outlook Shutdown: If Outlook is terminated abruptly or not shut down properly, OST files can get corrupt.
  • Large Sized OST File: Though OST file can hold quite a large size of data, huge data can make OST file malfunction and get corrupt at times.
  • Power & Network Issues: Sudden power cut and power surge can damage your system as well as Outlook OST file. Malfunctioning network devices can also harm OST file. Because of OST file damaged issue, there is a need to know how to repair damaged OST file
  • Incompatible Add-Ins: If incompatible add-ins are configured in Outlook OST files will get damaged.

Expert Solution to Know How to Repair Corrupt Outlook .ost File 2016 / 2013 / 2010 / 2007  

OST File Repair can be done in multiple ways. In this post, we will see two common met

  • The Supreme Method to Repair Damaged OST File 2016 / 2013 / 2010 / 2007 

In this section, we will tell you the perfect way to Know how to fix corrupt outlook.ost File. The technique is to use SysTools OST to PST Converter Software.  Here is how you can fix the OST file corruption using this software.

1. Download and launch OST to PST Converter Software.

2. Click on Add File button to add the corrupt OST file.

3. Now, select Advanced scan mode to remove all types of corruption.

4. All OST file items will get displayed now, even the deleted items will be highlighted in red.

5. Choose from PST, MSG, HTML, EML, and Office 365 to save the recovered OST files.

6. You can also apply advanced settings along with the general settings and choose a destination folder.

7. Click on the Export button to save the repaired OST file.

Unique Features of OST Recovery Tool
The latest version of OST Recovery Software some amazing features:

Recovered Deleted Files Highlighted in Red Color: All the corrupt and deleted files will be shown in red color after recovering. So, it will be easy for the users to find out those files.

Decrypt OpenPGP and SMIME Encrypted Files: Upon providing necessary keys, the application will remove both S/MIME and OpenPGP encryptions.

Search for OST File from All or Chosen Drive: If the users do not know the location of OST file, there is nothing to worry about. They can use the Search option of this software. This option searches within all system drives or any selected drive for the OST file and successfully locate it.

  • Commonly Used Manual Method to Fix Corrupt OST File Outlook

If you want to try some manual techniques, you are welcome. Now, we will also discuss a popular manual approach.

-- Updating the Folder

i. Navigate to the location of OST file and right-click on it.

ii. Select Properties from the options.

iii. On the newly appeared dialog box, click Clear Offline Items>> OK.

iv. Now launch Outlook email on the system and click on the Send/Receive button.

v. Click on Update Folder and this will update the OST folder. This may remove the OST file corruptions.

Note: The Manual Method to Repair damaged OST file has some limitations like if the manual method is not performed correctly. Then there is a risk of data loss. So it is better to opt the safe and reliable solution to fix corrupt OST file Outlook. 


In this post, we have discussed the problem of corrupt OST file. OST file corruption can happen to any Outlook user, so it is better to know How to Repair Corrupt Outlook .ost. Here we have mentioned several methods to repair OST corruption, of which, OST Recovery Tool is the best one. 

It removes all sorts of corruption and makes the OST file items completely corruption free. Regardless of the severity of the corruption, users can depend on this software and remain completely worry-free.

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