Utility to Repair and Recover Corrupted OST Files

Summary: In this article, we’ll discuss the utility to repair and recover corrupted OST files. We’ll also go over how to recover data from MS Exchange OST files (orphaned) using the most effective and dependable methods. I recommend that you read this article in its entirety for complete information.

The Exchange offline folder (OST) file is a local copy of the mailbox on the Exchange server that can be accessed offline. The OST file is called orphaned when the server mailbox is not accessible for an extended period of time. There are a variety of reasons why your Exchange offline folder (OST) file becomes orphaned. We categories them into two groups: hardware reasons and software reasons. Before we go any further, let’s take a look at the reasons for orphaned Exchange OST files. And the Finest way to repair and recover corrupted Outlook OST files.

Hardware Factors

Data catastrophe occurs when your hardware is damaged while storing or moving the data of your Exchange Server databases (EDB), and the server crashes. OST files will become orphaned around that time. There are three types in general:

Failure of a Data Storage Device, For example, suppose your hard disc has some bad segments and your Exchange Server databases are stored on them. You might be able to read a portion of the database file at that point. On the other hand, the information you read is inaccurate and full of errors. The database will become inaccessible as a result of the data corruption, and your OST file will become orphaned.

Server Abnormally Shutdown or Force Failure If a force failure occurs, or if you shut down the Exchange server inappropriately while the Exchange server is accessing the databases, your OST file may become orphaned.

Malfunction or failure of the controller card. If a storing controller is used with Exchange Server, a glitch or failure will result in the loss of all reserved data and database corruption, leaving the OST file orphaned. Let’s take a look at some of the software issues that can result in an orphaned Exchange OST file.

Reasons for Software

Exchange OST files can also become orphaned as a result of software issues.

  1. On Exchange Server, you can delete, disable, or deny access to a mailbox. If your server administrator erases or cripples the mailbox on the Exchange Server in comparison to the OST file, or if your access to the mailbox is denied. Your OST file is an orphan at this point, and you’ll need to use an OST Recovery tool to recover your mailbox’s data.
  2. Viruses and other harmful software Many viruses will contaminate and harm Exchange Server databases, rendering them unusable, and leaving the OST file orphaned. Installing quality anti-infection programming for your Exchange Server framework is strongly advisable.
  3. Errors made by humans. For example, accidentally erasing databases, mis-parceling storage devices, and mixing up the working framework will all render the Exchange Server database inaccessible, leaving the OST file orphaned.

Methods for Recovering Data from an Orphaned OST File

MS Outlook is the most widely used email application in businesses for communicating with employees. It saves all of its information in two program files, such as OST and PST. The OST file occasionally fails to connect to the Exchange Server Mailbox. Also, as a result of which files become orphaned and clients receive an error message when attempting to open them.

There are several methods to recover corrupted OST files and convert them to PST format. By following the two steps outlined below, you can restore synchronization between OST and MS Exchange Server, making orphaned PST files usable again:

  • Using the first MAPI Protocol to connect Outlook.
  • Using a MAPI address to connect to the first Exchange Server.
  • Following the steps below, you can convert an orphaned OST file to a PST file after restoring synchronization.
  • Execute the offline Exchange profile.
  • Go to the options tool menu >> Services >> at that point. Activate the Add button.
  • After that, you’ll need to add the PST service.
  • Choose the most appropriate messages to copy.
  • Then, from the File menu, select the Duplicate option.
  • Now select the PST that is created in the previous advance. Click the OK button in the copy to the dialogue box.
  • For each OST folder containing the message, you must rehash the means.

Note: The method described above is useful for backing up data from an OST file to a PST file format in order to avoid data loss and inaccessibility of data stored in an OST file.

If the orphan files cannot recover using this method, complete the conversion. The OST files should have been in good shape. Additionally, the master mailbox file should be accessible from the Exchange Server site.

Data from an Orphan OST File can Restore with the help of an Expert.

Aside from the method described above, there is a successful method for recovering data from an orphaned OST file, such as using an outside tool. The OST Data Recovery tool is one such device; it recovers corrupted OST files data from an orphaned OST file and saves it to a PST file.

Additionally, the tool restores all data by maintaining the integrity of data files. This utility is set up in such a way that it doesn’t require Outlook to recover data.


The reasons for the orphan Exchange OST file are discussed in the preceding review. Regardless, various ways of examining that will undoubtedly assist you in determining how to restore data from an Orphan OST file. If the manual solution fails, the client should use an outsider utility, such as OST Data Recovery Tool. This saves the client’s time and effort to recover corrupted OST files from orphaned OST files and convert them to PST files in a precise structure.

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