Also known as OST, Offline Storage Table file is a storage file in Microsoft Outlook. Even if the Outlook is not connected to Exchange Server or offline, you can still work on it with OST file. The Best Part of OST file is that it enables you to compose new mails, save your emails in drafts, delete or read existing mails, etc. in offline mode.Once it is connected to the Exchange Server again, all the changes made by the user to Outlook OST file get synchronized automatically with Exchange Server. OST files are basically duplicate copy of mailbox stored on Microsoft Exchange Server and stored in the hard drive of your computer.

Any damage to the Exchange Server doesn’t affect the files stored on your hard disk.At some point, you might also find that some of the files are either missing or deleted from OST files. It happens mostly because of OST corruption or certain mistakes by us. If OST file seems to be corrupt, MS Outlook provides official Integrity Check tool, scanost.exe to fix all your OST files.

Fixing with Scanost.Exe – Integrity Check Tool

Scanost.exe is an OST Integrity Check tool and a built-in repair tool that can repair and diagnose OST file. The tool scans both your mailbox file and OST file that is running on Exchange Server. It compares both your folders and items in each of the files and tries to fix synchronization issues between them. You have to be connected to the server to use this tool.

- Steps to Fix Errors with Scanost.exe
- Before you start your repair process, close MS Outlook
- Double click on Scanost.exe. By default, it is located at C:\Program Files\MS  Office\Office12.
- In case of having multiple accounts in MS Outlook, the tool will ask you to choose OST file that should be repaired.
- Click Connect, if it asks to Work Offline or Connect
- Choose any option as per your need
- Select “Repair Errors” to resolve errors automatically while scanning OST data
- Click “Start Scan”

In case scanost.exe is not able to repair your corrupt Offline Storage Table (OST) file, there is no need to worry! You can fix the error with the help of Regain OST to PST Converter Tool. It is a professional tool to fix the corruption in OST file because of any reason. The best part of this software is that it can recover all the lost or deleted files in MS Outlook after repairing OST file, such as Attachments, Emails, Notes, Meeting Requests, Journals, etc. from OST file.

How to Use Regain OST to PST Converter?

* Download and install Regain OST to PST Converter Tool on your PC
* Launch the software and follow the steps on the wizard
* Select “Open OST” option and find out your corrupt OST data stored on your computer
* Click “Find OST File” if you don’t know the location
* To choose a specific Outlook profile if you have several Outlook accounts, click “Outlook Profile” option
* If it has minor corruption issues in your OST file, choose “Normal Scan” option. If it is severely corrupt and unresponsive, choose “Smart Scan” option. Click on “Repair” button to fix your OST file.
* The repair process will be started automatically. After scanning, it will show the recoverable OST files.

Helping Guide & Tips Visit: https://vikashkaushikguide.wordpress.com/2017/04/05/how-to-fix-corrupt-offline-ost-files-using-scanost-exe/