Repair OST File without Any Limitation - 4 Quicks Methods

This post will help user's to understand the multiple solutions to repair OST file. Follow the instructions explained below and easily repair corrupted, inaccessible, orphaned OST file.

OST (Offline Storage Table) is automatically created by Exchange Server or an IMAP account setup. It has a significant function for Outlook users. It enable user's to access email even when there is no internet connection, server outage, etc. For a variety of reasons, OST files might become corrupted and unusable. In this post, I'll go over several ways to repair OST file and make it accessible.

Repair Corrupt OST File

Microsoft Outlook crashed abruptly and Outlook Offline data file (.ost) displaying crashed error signature information. In this situations user's communication will be disrupted. Simply repair OST file and restore mailflow. This article will walk you through the entire process of repairing corrupted OST file.

Stuck in Between & Don't Know How to Repair OST File

First of all, just take a deep breath, and relax. Your data is not going anywhere. Simple strategies discussed in this blog post and it will surely help you to repair corrupt OST file of Outlook, Exchange Server, Office 365 or any IMAP configured profile.

Let us first understand possible reasons to repair OST file.

  • Unable to open IMAP Outlook Data File (.ost).
  • Outlook Cannot Open a Particular Set of Folders.
  • Exchange Server Down or Not Responding
  • Having Archived OST File
  • Delete and Recreate Option Not Working

Note: In all such situations, Inbox Repair Tool or scanpst.exe is the prime solution that anyone will try to repair corrupt OST file. It is a inbuilt utility in Outlook application and used to diagnose and resolve Outlook data file errors. The Inbox Repair tool for OST file performs a quick scan and repair Outlook OST file (if required) to ensure that everything is fit as a fiddle.

Download SysTools OST Repair Tool:

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Let's Understand Methods to Repair OST File

Method-1: Repair OST File Using SCANPST.EXE

Using Scanpst.exe Get Things Better/Worse

"Unable to Repair OST File" I was confronting a few issues with OST File and attempted to repair with scanpst.exe. In spite of the fact that Inbox Repair Tool discovered some issue yet Scanpst failed to repair OST file as my issue still persist. Is there any professional way to repair corrupted OST file in Windows OS?”

There are number of users who reported numerous constraints like:

  • Inbox repair tool does not recognize the file .ost
  • Scanpst fails to repair ost file.
  • Unable to repair large size OST file.

According to them, it is capable to deal with only minor level of OST file corruption issue while you repair OST file of Outlook 2021 and below versions. Actually, it is true as scanpst.exe is not originally designed to fix OST file issues. Apart from all this:

“Microsoft” itself states in its blog:

  • This scanpst.exe is not able to connect or analyze the data kept in the Exchange mailbox. Moreover, this utility will locate only errors or corruption issues and let you fix the error or issue. However, if you are unable to resolve the issue by this inbuilt utility. Then try SysTools professional OST repair program and fix OST file issues.
  • Apart from this, Microsoft also suggests to backup the existing Outlook data file before using Inbox Repair Tool for OST file.

This scanpst.exe utility can be used in Outlook 2010 and above versions. If a user is working on Outlook 2007 or below version, the Inbox Repair tool is not available. Read More

Method-2: Repair OST File Using SCANOST.EXE

What’s The Real Story Behind Scanost.exe?

In the case of Outlook 2007 and below versions, Integrity Check tool is there to help users to repair Outlook OST file. It can also be called as scanost.exe. It was originally designed to repair corrupt OST file. However, the tool was discontinued from Outlook 2010 or replaced by scanpst.exe. If you are an old Outlook version user, then it is suggested to try this Integrity Check tool for OST file before switching to a third-party tool.

Can't Repair OST File?

Here’s How to Repair OST File with OST Intergrity Check Tool:

  • First of all, you need to look for the scanost.exe on the local machine
  • In Outlook 2007 : C:Program Files\ Microsoft Office\ Office 12
  • In Outlook 2003 : C:Program Files\Common Files\Systme\MSMAPI\scanost.exe
  • In Outlook 2002/XP : C:Program Files\Common Files\Systme\MAPI\scanost.exe
  • In Outlook 2000 :C:Program Files\Common Files\Systme\MAPINT\scanost.exe

Note: Make sure that Outlook is closed on your machine

  • Now, simply right-click scanost.exe application icon and run it as an administrator.
  • Here, you need to choose the profile containing damaged OST file.
  • Select the folders that you want to scan or you can choose Scan all folders option also.
  • After that, check the Repair errors checkbox to fix the issue.
  • Then, click on the Begin Scan option and start the scanning process of corrupt OST file.
  • As the scanning process completed successfully, “OST repaired successfully” message will pop-up on the screen. Click on the OK button to complete the process to repair Outlook OST file.
Scan OST Repair Utility

There is one other way also possible to repair OST file of Outlook 2021, 2019, 2016 and below versions. If you are having an Exchange email account, simply delete the OST file. After that, renew or regenerate offline Outlook data file.

Method-3: Recreate OST File & Fix Corruption Issue

Simply Regenerate Offline Outlook Data File (OST)

Everyone knows OST files are nothing but the copy of Exchange mailbox data. Therefore, it is not necessary to backup file. Exchange Server and IMAP user's are allowed to regenerate OST file at any time. And, to repair corrupt OST file, just follow the steps mentioned below:

Close Outlook & Go to Control Panel. Then, Double-click on Mail

Locating Mail:
In different versions of Microsoft Windows, the location of Mail in Control Panel is different. Thus, the easiest approach is type Mail in the search box given in the Control Panel. The Mail dialog box contains the current profile in the Outlook. To choose some other profile, click on the Show Profiles and then Properties option. You can also

Then, Choose Email Accounts Option from Email Accounts


Select Exchange Account from E-mail tab.Then click on Change button

Select Exchange Account

Now, Check "Use Cached Exchange Mode" checkbox & Click More Settings button

Cached Exchange Mode

Click on the Offline Folder File Settings option again

Now, Check Use Cached Exchange Mode checkbox under the Cached Exchange Mode Settings & click on the OK >> Next >> Finish button. At last, click on the Close button. This will help to repair corrupt OST file

Note: If Disable Offline Use is not selected, it shows the Use Cached Exchange

What else you can do for IMAP Configured OST Repair?

Simply Launch Outlook & Go to File Option & Choose Account Setting option

Outlook 2019

Select your Email Account on Data File Tab

Outlook 2019

Select “Open Data File Location” & simply Delete your OST File Data

Open Data File Location

Note: Make sure that you close Outlook before re-generating File

Finally, re-open Outlook to Regnerate & Repair OST File

Method-4: Professional OST Repair Tool Developed by SysTools

If you are having large size mailbox with slow internet connection, then regenerate OST file option will not work. In such type of situations, you can still give a try to scanpst.exe & run OST repair on corrupt OST file. This is the only option to repair corrupt OST file, if nothing works perfectly.

SysTools developed an advanced utility to repair OST file without data loss. The program is compatible with all Windows OS version. Apart from this it is capable to repair OST file of Outlook 365 and all desktop versions.

If It Does Not Work?

If you are unable to repair corrupt OST file of Outlook 2021, 2019, 2016, 2013, 2010 or below versions with the help of Inbox Repair Tool, then there is only one solution. Without wasting any time, switch to SysTools OST repair tool, we genuinely care about your data.

Don’t Worry, There’s a Catch!

You are having a damaged OST file and no free solution fixes is able to repair OST file. In such situations professional solution like SysTools OST Recovery Tool comes into account. The software will repair OST file from any type of corruption issues. It is a trustworthy application to repair corrupt OST file. After that, you are allowed to access it in any version of Microsoft Outlook without any hassle.

Looking for the best part?

There are some key-points that make this OST repair software best in repairing damaged OST file from the rest over the internet. For example, the software is capable to repair corrupt OST file (S/MIME or Open PGP). In addition, this OST Repair tool is also capable to restore deleted data from OST file in no time and highlight it with the red color. Apart from all this, there is no size and OS compatibility issue.

Free Live Demo: – SysTools OST Repair Tool Secured Download Version

FAQ - Clarify How to Repair Outlook OST File

Yes, Integrity Check tool (Scanost.exe) repairs OST File but only in the case of Outlook 2007 and below versions Click here to know why it does not repair OST file of latest versions

Microsoft itself states in its blog that scanpst.exe tool is not able to connect or analyze the data kept in the Exchange mailbox. So, in this case go for ScanPST.exe alternative developed by SysTools.

To repair OST file in Outlook 2007 and below versions, OST Integrity Check tool is there to help users to repair Outlook OST file. It can also be called as scanost.exe.

Integrity Check (Scanost Location)

  • Outlook 2007 : CDRive > Program Files > Microsoft Office> Office 12

Yes, but for this you have to use SysTools OST repair tool. Because all other methods are dependent to Outlook and Exchange/IMAP profile.

For the severe level of corruption issues, the user can use the OST repair tool to repair corrupt OST file of Outlook 2021, 2019, 2016, 2013, 2010, 2007 and its below versions.

What’s the Bottom Line?

Corruption in OST file is a severe problem faced by Outlook users. No manual approach guarantees to repair Outlook OST file in the best possible manner. Therefore, moving towards professional tools to repair damaged OST file is not at all a bad choice. The software will repair corrupt OST file and then save it PST format also for easy access. So, the OST repair tool also helps you to convert OST to PST file format.