How to Fix Corrupted OST Files in Outlook 2016

In your office, are you using Outlook 2016 that is connected to Exchange Server and currently facing the issue of OST file corruption?

When the Outlook offline data (OST) file becomes damaged, all the business data stored in it becomes inaccessible, thereby pausing all the business communication and other business-related work. In such a situation, it becomes indispensable for you to repair the damaged and inaccessible OST file in the best possible way and minimum time. Further, it becomes essential to convert the inaccessible and corrupted OST file into PST.

With these tasks done, you will be able to easily import the PST file in Outlook using the inbuilt Import/Export Wizard and permitted to access the stored all business data, be it emails, attachments, contacts, calendar, tasks, journals and more. ‘OST file repair’ and OST to PST’ conversion in minimum time ensures quick resume of business activities, whereas these done in the best possible way ensures that you work with your Outlook 2016 client and Exchange Server smoothly.  But what could have damaged your Outlook (OST) file?  

OST file corrupted and inaccessible! Know the reasons

The different reasons for corrupted and inaccessible Outlook offline data (OST) file are as follows:

1.    Logically or physically corrupted hard disk drive – Outlook OST file can become damaged or inaccessible due to logical/physical corruption in the system’ hard disk drive (HDD) in which users might have stored the OST file. The bad sectors in the HDD may be responsible for physical damage in the HDD.

2.    Computer virus or malware attack – Attack by a PC virus or malicious code is another significant reason for corruption in Outlook OST file. Like any other data stored in your system, the OST file also gets affected by computer viruses or malware. As prevention, you can install powerful anti-virus software that is effective and successfully prevents the PC viruses and malware from entering into your system.

3.    Unusual or Abnormal Outlook Termination – If Outlook is closed or terminated abnormally while opening, accessing or synchronizing the Outlook Offline (OST) file, then the OST file becomes damaged. This can happen in situations when Outlook is busy in performing a task, and you close it by a click on ‘End Task’ in Windows Task Manager, or if you force shut down the system without closing Outlook and system using the correct method.

4.    Problem synchronizing between Outlook and Exchange Server – OST file that is stored locally on the user system needs to sync with Exchange Server once the Internet connectivity resumes. However, there are times when synchronization between the client and server fails, resulting in synchronization errors. This results in damaged and inaccessible orphaned OST file. Resolve this issue by repairing the OST file and convert it to PST format.

Solutions for damaged and inaccessible OST file

The different solutions using which damaged and inaccessible OST file can be repaired and made accessible are as follows:

1    Use scanpst.exe – Run scanpst.exe (Inbox Repair Tool) against the damaged and inaccessible OST file. It is an inbuilt utility in Outlook that can be used to repair both OST and PST Outlook data file. It checks for errors and attempts to fix those. Note – This is the manual way of repairing OST file using which the OST file may or may not get repaired successfully, i.e. successful repair of OST file is not guaranteed. Failure repairing the OST file can be due to severe damage or lack of technical know-how that is necessary for users to use this tool.  

2    Software fix – Another solution to turn corrupted and inaccessible OST file usable and accessible is the use of a software solution that can repair as well as convert OST file into PST format. The advantage of a software fix is that it is automated and hence faster as compared to the manual method. One name that suffices this is Stellar OST to PST Converter. The advantages of this software are: it works on password-protected OST file, previews emails and calendar entries before saving, multiple saving options in MSG, EML, HTML, RTF or PDF, recovers all mailbox data such as emails and attachments, contacts, calendar, tasks, journals, notes and more. 


Though, it is all on you to choose between the manual and automated solution and if automated which tool to use for repairing OST file. Nevertheless, the motive of this article is to guide you towards the right path when it comes to repairing damaged OST file and making the stored mailbox data accessible. Therefore, it is suggested that you go for Stellar OST to PST Converter – the automated way to address ‘OST file keeps getting corrupted in Outlook’ issue. With the help of this software you will be able to recover OST file And  PST and reduce further chances of corruption with split or compact PST option.  

Author Bio:

Rajan Singh is a Sr. Technology Consultant at Stellar Data Recovery Inc. and has published several article on MS Exchange emails, IOT, APIs, bug fixing etc.

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Global Technology Updates

Manish Garhwal

Manish is Article writer at Global Technology Updates. Loves Programming and Xiaomi. He is Xiaomi Software Repairer. Gaming is one of main part of his daily routine. He is currently Studying Computer Science Engineering in Thakur Shivkumar Singh Memorial Engineering College.

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1 Response

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