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OST Recovery Software

A simple OST converter to export orphaned, corrupt, or inaccessible OST data to Outlook PST files and destinations like Office 365, Exchange Server, web-based email clients, and various other file formats securely.


A perfect recovery tool with a simple user-interface and multiple saving options. See more

  • Restores missing/deleted Exchange mailboxes from orphaned OST files
  • Retrieves complete OST data including the deleted items
  • Recovers multiple OST files to PST in a single batch
  • Supports large OST file recovery & conversion - no file-size limitation
  • Full mailbox preview– then retrieves individual items or entire OST folders as required
  • Recovers deleted items from corrupt OST files
  • Quickly searches any specific email or item from OST folder
  • Restores everything - Exchange distribution lists, appointments, email attachments, etc.
  • Recovers OST file items to PST, DBX, MBOX, MSG, HTML, MHTML, PDF formats
  • Restores OST mailbox to Office 365 and various email servers, web mails
  • Splits large PST file after a specified size limit – 1GB, 2GB, and so on
  • Lifetime license validity (no renewal charges)

Exchange OST Recovery

Expert Reviews

See how the experts have applauded the performance of the software.

Software Features

Features of the software are noteworthy and remove any corruption from the OST files. See more.

Flawless OST File Recovery Flawless OST File Recovery

The OST recovery tool accurately converts inaccessible/corrupt OST files into easily accessible MS Outlook PST files. You can recover multiple OST files to PST files in a single attempt.

Recovers all OST items Recovers all OST items

The tool recovers emails (with full attachments), posts, appointments, contacts, tasks, meeting requests, journals, notes, and everything else. Email properties (like Subject, To, From, CC, BCC, Date, Time) are also recovered by OST recovery tool.

Restore Exchange mailboxes from OST files Restore Exchange mailboxes from OST files

If you have some mailboxes missing or deleted from your Exchange, you can restore them from OST files on the user systems. This is the only way you can recover missing or deleted mailboxes if you don’t have backups. After Exchange crashes or downtime, all user mailboxes can be recovered by this way.

Retrieve unsaved OST data before OST rebuilding Retrieve unsaved OST data before OST rebuilding

If you have some unsaved (unsynchronized) data in OST files, you may lose that while rebuilding the OST file. So, it is suggested to convert your damaged OST file to PST before rebuilding the OST file.

Search for OST files Search for OST files

If you don't remember the exact location of the OST files, then not a problem. The ‘Search’ function is smart enough to locate your hidden OST files when specifying a folder/drive for the search. OST Recovery tool then enlists all the OST files present in the selected search volume – making it easier for you to select the appropriate ones for recovery.

Filter OST data and recover selectively Filter OST data and recover selectively

Use the 'Find' option to instantly find particular email messages from OST file folders. You can search by criteria like From, To, Subject, Date, and Items. These filtered items can be recovered selectively.

Restore OST to Office 365/Exchange Restore OST to Office 365/Exchange

Restore OST file data to Office 365 or to email servers (MS Exchange Server, Novell GroupWise, and Lotus Domino) directly (so that there is no need to use export/import features).

Recover 25 items free Recover 25 items free

Its trial version can be downloaded and installed free of cost. The trial version allows you recover corrupt/damaged OST files, and preview the mailbox items. But the trial version allows you to save only 25 items from each folder.

Split PST files Split PST files

OST recovery tool offers a splitting option (Split file after 1 GB, split file after 1.5 GB, split file after 2 GB, etc.) to save the data from large OST files in small, easily manageable PST files.

Supports all Outlook/Exchange versions Supports all Outlook/Exchange versions

This tool has compatibility with all the MS Outlook versions. It supports all the versions from Outlook 98 to Outlook 2021/Office 365. Also, it works with OST files created in all Exchange versions including the latest Exchange 2016 & 2019.

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How it works?

OST Recovery software adds the OST file from its location and fixes any error or corruption. Later, you can save the recovered data items in the available formats.



Repair OST files of any version of Outlook/Exchange and use the software on any Windows platform. See more specifications.

System Requirements
  • Pentium Class Processor
  • Minimum Memory : 2 GB
  • Disk Space : Minimum 100 MB Free Space
Supported Versions
  • Windows: 365/11/10/8.1/8/7/Vista/XP/2000/98/NT/95
  • MS Exchange Server: 2019/2016/2013/2010/2007/2003/2000/5.5/5.0
  • MS Outlook: Office 365/2021/2019/2016/2013/2010/2007/2003/2002/2000/98/97
  • Outlook Express: 6.0/5.5/5.0/4.0

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Free trial version

The trial version of the software is completely functional, but it will allow saving only 25 items per folder. Download now

Software Features Trial Version Full Version
Preview of All Recovered Data
File Saving Strength Saves 25 Items per folder to PST, EML, MSG, DBX, TXT, HTML, MHTML formats Save Unlimited files and Formats + Enhanced File Saving Capabilities
100% Safe & Secure
(24x7) Free Technical Support (Live Chat, Emails & Phone)
Supports All Latest Versions
  Download now Download Now Purchase now Purchase Now

OST Recovery

Case Study

Some real cases to show how our software has helped the users to recover the OST file data.

Exchange OST Recovery


To gain a deep understanding about the software, read various FAQs and their detailed answers.

The tool possesses some of the extra-ordinary features that distinguish it from other available tools, such as:

  • Find Message: Makes searching and finding of required email messages an easy task. The messages can be searched in specified folders containing OST files on the basis of different search criteria like From, To, Subject, Received before (Date), Received after (Date), and Message has attachments.
  • Save Snapshot: Saves a snapshot of the repaired OST file at desired location to save the time consumed in rescanning the damaged OST files.
  • Load Snapshot: Lets user to load a previously-saved snapshot from specified location to continue with the OST file recovery process.
  • Save in multiple formats: Recovered OST files can be saved in PST, MBOX, MSG, DBX, EML, TXT, RTF, HTML, MHTML, or PDF file formats. Also, retrieved items can be directly saved to Office 365, web mails and email servers.
  • Preview before saving: Users can preview the recovered OST file data items to check the accuracy of data recovered before saving it in desired format at desired location.

The software effectively repairs those OST files that got corrupted, damaged or inaccessible due to various reasons like Exchange Server crash, database corruption, Microsoft Exchange Server downtime, accidental user account deletion, corruption in Exchange Server, virus-attacked OST files, accidentally deleted or password-protected OST files, corruption in the storage media, etc.

  • Split Option:
  • Select “Do not split file” option if you want to create a single PST file
  • Select other PST size split options, if you want to split the PST file after a particular size.
  • Attach prefix to store name: Select this option to add prefix to store name that will be visible in MS Outlook.

No, The software doesn’t require original Outlook profile while performing email conversion.

Yes, The software thoroughly scans the selected OST file, and displays all the lost and deleted items which the software highlights in the RED color. All the lost/deleted items in RED color are also completely recoverable by the software.

Before deciding to purchase the full licensed version of any software, user must first give the software a try by downloading its free trial version. Using the free demo version, one can easily analyze and judge the capabilities of the software and various functionalities offered which makes the particular product different among others. If satisfied with the performance and the accurate results of the software; or if the software provides the successful recovery and conversion as desired, then user must make wise decision to purchase the license key of full version of the software.

OST recovery tool is available as a free demo version to let users evaluate the features, functionalities and capabilities before deciding to purchase the full licensed version. The free demo version works exactly similar to that of the full version such that it accurately recovers data from damaged OST files, and displays preview of entire recovered data. But it allows users to save up to 25 items per folder only. To save the entire recovered email data from OST files in PST file format, user must purchase the full version of the software.

You can provide an OST file of any size, there is no restriction on OST file size for converting it into PST file format while using the OST Recovery software.

  • Save all time: Saves emails of all time.
  • Save between selected date range(s): Saves emails of selected date range(s).
  • Do not save between selected date range(s): Skips the emails of selected date range(s).

User Reviews

and Ratings
Exchange OST Recovery
(4.9 / 5) 655 Reviews

Reviews 655

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3rd November 2021 7:02pmAngelina
Excellent recovery process. I love the features and performance of the software. Love to recommend this tool to others.
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18th October 2021 3:01pmSadie
Perfectly executed by developers and well guided by the customer support team. Thank you, all KDR Tools team, for this.
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27th September 2021 6:43pmFelix
Recovery is completed at a very good pace. The software is very accurate with its results. No description is needed to operate the software. Excellent work.
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13th September 2021 1:40pmEthan
I think it is the simplest and most effective tool to recover corrupt or inaccessible OST file data. Thanks for this advanced tool.
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1 2 3 > Last
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