Guide on Conversion of Corrupted OST to .pst File

  • A reliable software that easily converts damaged offline OST files to PST data files
  • Capable to resolve errors and corruptions with both OST an PST files
  • Runs smoothly on all editions of MS Outlook email
  • Secure and convenient to use



When the Microsoft Outlook is linked with the Exchange Server, the entire mailbox database can be accessed while downtime via Offline Storage Folders files. In Outlook, activating "Exchange Cached Mode" option enables you to download mailbox emails, contacts, calendars entries and other related Outlook items on your system. When the connection with Exchange Server is restored, updates of OST file get synchronized with Server and the files become ready to be shared. But, sometimes the OST file sync process fails due to physical or logical corruption issues and such circumstances call for OST to PST conversion software to work around the situation.

Consider a scenario of synchronizing OST with Exchange server which gets interrupted due to some error and displays an error message that states:

"A problem occurred while doing OST sync operation for user 'username'".

This error message might be the result of the following reasons:

  • There are chances that modifications in a user profile are made due to which OST file is unable to make the connection with Exchange Server
  • The mailbox constitutes of corrupt or damaged mail items
  •  The local area network (LAN) connectivity is not adequate

The importance of OST to PST converter software arises when you are unable to access your offline file folder (OST file) to view the changes made during offline work. Since the work done in OST files are synchronized with Exchange Server so you don’t have to access your OST files. But, in the case of Server down or a network problem when file synchronization between the local OST files and Exchange Server gets disrupted, it becomes essential to gain access to the OST files to incorporate the changes.

Similar to the Inbox Repair Tool also known as ScanPST.exe, MS Outlook also comes with another inbuilt utility called OST Integrity Checker Tool also known as ScanOST.exe. This utility is installed when MS Outlook is being installed in the system and is located in the following location of the local hard disk: C:\Program Files\Common Files\System\MAPI\Locale ID folder. When it is found that that the OST file has gone corrupt or some information is missing from the file or due Exchange Server failure, data synchronization is not taking place, the Integrity Checker Tool or ScanOST.exe can be used to fix the corrupted OST files. This tool can be used to identify problems with OST files and to resolve synchronization issues.

Since now it is clear that the problem of accessing files from corrupt or orphaned OST files cannot be completely solved by using the inbuilt integrity checker tool. OST to PST converter tool gives the desired result when dealing with orphaned or corrupt OST files compared to other methods of OST to PST conversion. However, with the use of OST to PST converter tool, it is possible to overcome this issue very easily. OST to PST converter program works by converting the corrupt .ost files into a .pst file format. Once this software converts OST to PST file format, a local email client like MS Outlook can be used to access the file contents. Therefore, by conversion from OST to PST, all mailbox items and messages with the offline changes can be conveniently accessed from MS Outlook client. You will be able to convert Outlook 2010 OST file to PST file and supports OST files of Outlook 2016, 2013, 2010, 2007, 2003, 2002, 2000 version. You can even successfully convert a password protected OST files, which are highly encrypted or severely corrupted OST files into PST file format.

Follow the steps to convert corrupt OST to PST:

Step 1: Download and Install the Convert OST to PST tool. You can see the main window where two options "Open OST File" and "Find OST File" are listed at the bottom of the window. Simply click on "Open OST file" option in order to commence the conversion process as shown in Figure A

Convert Corrupt OST to PST - Main Window

Figure A: Main Window


Step 2: Once you click on Open OST file option, a new window appears from which you need to click on the "Browse" button for selecting your OST file that need to be converted into PST file. After selecting, you needs to click on the "Next" button as shown in Figure B

Convert Corrupt OST to PST - Select OST File

Figure B : Select OST File

Step 3: After you click on the "Next" option, a new window appears, in which you have to select a location for storing the converted OST files as PST files by clicking on "Browse" button. After selecting the preferred location for storing the converted OST files, you need to click on the "Convert" button to start the conversion process as shown in Figure C

Convert Corrupt OST to PST - Path for Storing Converted OST File

Figure C : Path for Storing Converted OST File

Step 4: Once the conversion process is over, you need to click on the "Finish" button as shown in Figure D

Convert Corrupt OST to PST - Finish Window

Figure D: Finish Window