Resolving Abnormal OST File Working With a OST File Reset

Published On - April 11, 2023 by Nasir Khan | Reading Time: 4 minutes

Have you ever experienced an Outlook OST (Offline Storage Table) file issue while trying to access emails in Outlook? It’s a common problem that can be quite frustrating, as it prevents you from accessing your emails. Fortunately, there is a way to reset the OST file and fix the abnormal working.

In this guide, we’ll walk you through the process step by step. We’ll also answer some common questions about Outlook and OST files.

So, if you’re ready to take control of your emails and normalize the working of your emails again, let’s get started.

Introduction to OST Files

Do you ever get an error message when trying to open Outlook? Chances are, something is wrong with your Offline Storage Table (OST) file, commonly known as the OST file. The OST file contains copies of your emails and other data from your Exchange server mailbox so that you can access your data even if you don’t have internet access.

Why Does an OST File Become Abnormal?

When it comes to OST file issues, a lot of people don’t have a clue as to what is happening or why. The OST files are responsible for synchronizing the Exchange server with mailing clients, so any abnormality in the working of the file could be detrimental to your office workflow.

So why does an OST file become abnormal in the first place? The primary reason is the corruption or damage of Outlook profiles that causes synchronization problems between Exchange and Outlook clients. This can happen due to multiple reasons such as:

  • Bad sectors on a hard drive
  • Abrupt shutdowns of Outlook
  • Viruses and malware causing harm to Outlook database
  • Hardware issues that cause damage to Outlook mailbox data
  • Network connection failure between Exchange server and Outlook clients

Once you understand the underlying cause of why your OST file is behaving abnormally, you can use this guide to reset the OST file and get your operations back in order.

Ways to Reset OST File and Fix the Abnormal Working

In some situations, you may have to reset OST file to fix the abnormal working. This would involve renaming the existing file and creating a new one. How do you go about doing this? Here’s a step-by-step guide:

  1. Close all Outlook applications and any other programs related to your emails.
  2. Go to Start > Computer > C: (your system drive) > Users > Your User Name > AppData > Local > Microsoft > Outlook (this folder contains all your PST/OST files).
  3. Find the OST file, right-click on it, and rename it to something like “Old_Outlook” or “Outlook_old”.
  4. Launch Outlook again, so that a new OST file is created automatically.
  5. Now, you should be able to use Outlook as before, without any errors or abnormalities.

Do note that by doing this, all your emails stored in the old OST file will be lost and cannot be reverted back to normal working conditions. If you want to keep all your emails safely backed up, we recommend downloading and using a reliable third-party tool like Regain OST recovery tool. It helps you easily reset your OST file while keeping your emails safe and secure at all times.

Benefits of Using a Third-Party Tool to Reset OST Files

Another great advantage of using a third-party tool is that the process of resetting your OST file is streamlined and hassle-free. You don’t have to painstakingly go through the manual process, which can be very time-consuming and error-prone.

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Moreover, with a third-party tool, you get better and more accurate results, allowing you to resolve any abnormal working issue with your OST file in no time. Here are some major benefits of using such a tool:

  1. Restores data & information – Whether you have accidentally deleted data or suffered from a system crash, these tools can help restore all data in your OST file back to working condition.
  2. Maintains folder hierarchy – All folders and subfolders within the OST file are maintained with their structure intact so that users can easily search for their important data.
  3. Ensures safety & security – A third-party resetting tool ensures that your critical data remains secure throughout the entire process, giving you peace of mind that no information will be lost or accessed by anyone else without permission.

Using this tool to reset your OST files is definitely the easiest way to go about it. The software ensures accuracy and safety while allowing you to get back to work quickly without any major hassles!

Where to Find Suitable Tools for Resetting OST Files

Do you need help finding the right tool to reset your OST file in order to fix the abnormal working of Outlook? Don’t worry, we’ve got you covered. Several Microsoft MVPs suggest a tool for resetting OST files and fixing the abnormal working called Regain OST recovery tool. A free version is also available of this tool.

It helps recognize any invalid page or damages within the OST file and repairs it accordingly. The tool can also help you with any corruption issue, scan and detect the problems, and fix them all. So that you can have peace of mind knowing that your data is safe and secure once again!

Tips to Prevent Corrupt OST Files

Having corrupt OST files can be a real pain. It can mean lost or inaccessible emails, and no one wants that. Fortunately, there are a few tips you can use to prevent this from happening in the first place.

Tip 1: Don’t use third-party add-ons

Third-party add-ons can cause conflicts with Outlook, leading to errors or problems with Outlook or related programs. So it’s best to avoid them if possible.

Tip 2: Disable hardware acceleration

Hardware acceleration is designed to speed up the performance of your computer by allowing it to utilize more of the hardware resources available. However, it can sometimes interfere with Outlook’s performance, so disabling it may help reduce the risk of corrupting your OST file.

Tip 3: Increase disk space

Outlook requires plenty of disk space in order to run properly and store data like emails. So make sure your computer has enough disk space before running Outlook, as this will help reduce the risk of corrupting your OST file.

By keeping these tips in mind, you should be able to reduce the chances of getting an abnormal OST file issue and the highly likely issues that come with it.


So, it’s time to tackle those OST file issues you’ve been struggling with. Whether you’re a novice or a pro, the steps outlined in this article can make all the difference when it comes to reset the OST file and fix the abnormal working.

If you follow the steps outlined in this guide, you should be able to reset your OST file and get back up. The most important thing is to stay patient and don’t give up.

We hope this guide has provided you with the information and resources you need to reset your OST file and solve the abnormal working issues you’ve been dealing with. Best of luck!

Author: Nasir Khan

I am Nasir Khan from India, working as a Content Developer in Regain Software. Here I am writing about our products and their updates. And writing some free solutions from converting emails or Cloud Migration process. We have tools like Email Converter, Emails backup and Cloud migration.

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