How to Recreate OST File in Outlook Using Manual Steps

Summary: If your Outlook OST file got corrupt and you lost all your important database & information. Then this article is for you. Here I am going to explain how to recreate the OST file from the corrupted Outlook database. Here, You will find out the manual way to perform Outlook recreate OST. It also expresses what an OST File is and how it helps users during offline mode. Moreover, You will also get to know about a reliable tool named OST File Recovery tool which is recommended by experts. Download Now   Purchase Now

OST is a file format for the offline data file of Microsoft Outlook. It stands out for the “Offline Storage table”. As the name suggests it is an offline folder file that stores a synchronized copy of the information on your local system/computer. Imagine yourself on a plane or on a yacht, where there is no data connection and you want to access your e-mails, calendar, tasks, and contacts then you can still access them. If you are curious how is it even possible? The answer is that all your IMAP accounts, Office 365 accounts, Exchange accounts, and accounts use an Offline Outlook Data File (.ost) file where they store data offline. But you can use only previously downloaded data. And when the connection is back it will automatically do all the changes over server data, done on the offline file.

Why Do OST Files Get Corrupted?

OST files resemble our mailbox server data during the no-connection period. OST file is stored in our system so this becomes a vulnerable amount of data, which can be harmed at any time. It originates multiple errors from time to time like:

  • Corrupt OST.
  • Synchronization issues.
  • Inaccessible OST.

There are multiple reasons for OST file corruption. There could be multiple reasons for your problem:

  • Deletion of user account over Exchange Server.
  • Malicious files (virus attack).
  • Abrupt termination of applications.
  • System Crash.
  • Interrupted power supply.

Given above are several factors responsible for recreating OST files in Outlook. You can also check ways to Fix Outlook POP Server Timeout Error 0x8004210a, here.

Method 1: Recreate OST File in Outlook Using Outlook Utilities

MS Outlook is embedded with some tools that assist us in restoring the OST file. Different Versions of Microsoft Outlook the diverse types of tools to recreate Outlook OST files like:-

MS Outlook (Version) Tool (As per the version)
Outlook 2000 Detect and Repair Tool
Outlook 2003 Detect and Repair Tool
Outlook 2007 Office Diagnostics tool
Outlook 2010 Detect and Repair Tool
Outlook 2013 Detect and Repair Tool
Outlook 2016 Detect and Repair Tool
Outlook 2019 Detect and Repair Tool

“Outlook 2013/2016/2018/2019 got a different method of exporting mailbox as a PST file and saving OST data to PST file also.”

Method 2: Recreate OST File Manually using Outlook Applications

Another Method to recreate the OST file is mentioned below, where you can directly download it from the mail server by following further steps:

  1. First, close the Outlook application.
  2. Go to the Search panel of Windows and search for the control panel.
  3. Click on the control panel and select mail from the control panel.
  4. You will get a dialog box named “Mail Setup -Outlook”, click on “E-mail Accounts”.
  5. You will get another dialog box named “Account settings”, Click on the “Data files” tab, select OST, and then navigate to file a location.
  6. By right-clicking you will find the delete option, what you need to do is delete the OST file.
  7. Finally, run the Outlook application, hope it will resolve the OST file problem.


As I told you OST files are stored in our system (Client-side) and contain the synchronized information of our Outlook Mail Server to help us out in the situation of network loss between the system and the mail server. The reason for their vulnerability is that they are on the client side so it’s not safe for them and leads to errors and failures. Moreover, we also discussed some effective methods to help you to recreate the OST file. If there is an issue remaining then you can go for any third-party app. I prefer the OST File Recovery Tool to solve my issues in the worst case, so you can also go for that. So, this was “How do I rebuild an OST file in Outlook”. Hope you liked it.

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About The Author:

Mithilesh Tata is a technical expert who has assisted thousands of clients with Microsoft Outlook and other cloud-based email clients. He enjoys writing on email clients backup as well as email migration. He is always excited about giving troubled readers the most up-to-date knowledge, explanation, and user-friendly solutions.

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