Troubleshooting Error Messages Encountered while Accessing OST File

  • The top-recommended tool known for resolving Outlook errors in a secure way
  • Deals with corruptions or damages to the PST/OST files
  • Simple to use and run by any user
  • Assures no damages to the original file contents



OST is the short form of Offline Storage Table file and it is a database file of Microsoft Outlook. It allows the user to work with their Outlook profile even in offline mode or when the application is disconnected from the Exchange Server as, it fetches all the required data when the system in online such as emails, contacts, calendars, events, and other Outlook attributes. Then as soon as the internet connectivity is retrieved, all the changes made to the .ost file will be automatically synchronized with the Exchange Server. So, it is also called as a copy of Exchange Server which will be stored in the computer hard drive.

But sometimes, when you try to open or access your Outlook OST file or synchronize it with Exchange Server, you will encounter with error messages like “Cannot open the emails folder. The file .ost is not an offline file, OST file canoe be accessed in Outlook, OST file cannot be opened etc.” . This is due to the corrupt or damaged OST file.

OST file may get corrupt or damaged due to various reasons and become inaccessible by displaying the above-mentioned error messages. Due to corrupt OST file, there are even chances that some of your Outlook items might be deleted or missing from it. So in such situations, you need to make use of an advanced tool named as the Convert OST to PST Software which will easily help you in OST error repair. It is an effective tool which can also be used to convert the OST to PST file after errors.

Scenarios responsible for OST file error

Virus Attack: If your computer system is attacked by harmful viruses, then there are chances that some of your essential files stored on it may get corrupt or damaged including OST file. If the OST file is corrupted, then you will face error messages when trying to access it.

Oversized OST file: OST file will have a maximum size limit, if it gets exceeded then, there are possibilities that it may get corrupt. So due to oversized OST file, you will encounter with OST error messages.

Power Surge: While using OST file or while synchronizing it with the Exchange Server, if your system unexpectedly gets shut down without terminating the Outlook application due to a power surge, then it leads to OST error messages.

There are few more reasons, due to which you will encounter with OST error messages such as OST header corruption, interruption while sharing OST file across the network, use of the unreliable tool to compress OST file etc. So, in order to overcome these problems or to repair OST error, you can use convert OST to PST software.

Convert OST to PST Software is an efficient tool which has been suggested by many industry professionals to repair OST error. It can easily recover all lost or deleted emails, notes, events, contacts, journals and other attributes while repairing OST file errors. This OST error repair tool supports you to repair OST error on all Outlook versions like it can be used to repair corrupt OST file Outlook 2010, 2016, 2007, 2003, and even 2013 in order to fix the OST errors. It can easily repair Outlook OST file error which has been highly encrypted and password protected. This OST error repair has been embedded with more interactive, user-friendly GUI that helps you to know how to repair OST file error in a few simple steps. It supports all versions of MS Exchange Server to repair OST file error. This application is well-suited with all versions of Windows OS for repairing OST file error. After repairing OST file error, it facilitates you to Preview the repaired OST file before restoration. This advanced software can also be used to convert encrypted OST to PST file in just a few mouse clicks.

Follow the Steps to Fix Error Messages Encountered while Accessing OST File:

Step 1: Download and install the software. Select the OST file which you need to repair using one of the options from the three provided in the main window, as shown below in Fig 1.

OST Error Repair - Main Window

Fig 1: Main Window


Step 2: Select the scanning method as a Normal scan (recommended) or Smart scan to repair OST file error and then select destination folder for a new repaired healthy OST file.

OST Error Repair - Select Scanning Technique

Fig 2: Select Scanning Technique

Step 3: Preview the repaired file in the style browser after scanning. If you are completely satisfied with repaired results, you can purchase the software.

OST Error Repair - Regained Outlook Data

Figure 3: Repaired OST File