Convert OST to PST

Convert Inaccessible OST Data into Outlook PST

MS Outlook along with Exchange Server provides an efficient email communication platform to its users. Exchange Server manages all sent/received emails and saves all user mailboxes in a single database named as EDB or Exchange Database. On the other hand, MS Outlook automatically creates OST (offline storage files) which are exact replica of Exchange server user mailbox. OST files are stored on the local user system and play very important role in uninterrupted email communication. OST file stores your email data when you are in offline mode because of no connection with Exchange Server. Further, all the changes done in OST file are synchronized with Exchange server database when connection is re-established between Exchange server and MS Outlook.

download free ost to pst tool

There are various hardware and software reasons that affect integrity of OST files. Some of them are hard disk failure, network connection failure, power failure, attack of malicious virus, abnormal termination of Outlook, synchronization errors etc. Such situations result in inaccessibility of OST file data. OST files cannot be directly accessed, you must need to convert OST file into PST format, which is easily accessible through MS Outlook. Thus, a proficient convert OST to PST tool can be helpful.

Let us discuss few scenarios that force you to use Convert OST to PST:
  • Your OST file has been corrupted or damaged before synchronizing its changes to the Exchange Server.
  • The damaged or inaccessible OST file contains very important email data and you need it at any cost.
  • The mailbox of a user is deleted from the original location and you need to access some emails of this mailbox.
  • Suppose, your Exchange Mailbox is shutdown and in that time if you need to access some emails saved in the OST file, then you need to convert it to its corresponding PST.

In case, the OST file is corrupt and you want to fetch email data, then you might come across various error messages that point towards damaged OST file:

"Event Type: Information

Event Source: Outlook

Event Category: None

Event ID: 30 Date: 5/10/2008

Time: 8:33:44 AM

User: N/A

Computer: SBS-Computer

Description: The store C:\Documents and Settings\user.domain\Local Settings\Application Data\Microsoft\Outlook\outlook.ost is being reconciled with the indexer for the following reason: Non-matching max change numbers."


Most of the times, this error occurs due to corrupt or damaged OST file.


If the OST file is damaged, then you can try an inbuilt tool named as OST Integrity Check tool (Scanpst.exe). For executing this tool, follow the steps below:

  • Close Outlook if running.
  • Double-click Scanpst.exe, located at drive:\Program Files\Microsoft Office\OFFICE12.
  • Enter the name of the OST file that you want to check, or click Browse to search for the file.
  • Click Start.
  • If errors are found after completing the scanning process, you will be directed to start the repair process to fix the errors
  • A backup file is created during the repair process
  • Click Repair
  • Start Outlook by using the profile that contains PST file that you tried to repair
  • If you see a Recovered Personal Folders folder, you can create a new PST file, and drag such items in “Lost and Found” folder into the new PST file.

In spite of that, it you are unable to access your infected OST file then you should try Kernel for OST to PST, which is a sophisticated convert OST to PST and fixes all possible OST file issues. It enables you to access your emails, attachments, contacts, journals, calendars, and notes, drafts, sent items, etc. from inaccessible OST files by converting the OST file into PST format. It quickly extracts deleted, lost or unreachable OST file and converts them to Outlook PST format. It carries out an extensive scan of damaged OST file, recovers all email data, and displays them in a list with preview. Before purchasing it, you can try free trial version of this convert OST to PST tool.

free download ost to pst software

Supported versions
  • MS Exchange 5.0, 5.5, 2000, 2003, 2007, 2010 & 2013
  • MS Outlook 2013, 2010, 2007, 2003, XP, 2000, 98 and 97
  • Outlook Express 5.0 and above
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