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OST Recovery Software

Effortlessly convert corrupt, orphaned, or inaccessible OST data to Outlook PST files, Microsoft 365, Exchange Server, web-based email clients, etc. using this secure and user-friendly OST Recovery Software.

Kernel OST recovery


Find out more about the benefits offered by this simple and intuitive recovery tool.

  • 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 with no size limitation
  • Full mailbox preview for entire or selective recovery
  • Recovers deleted items from corrupt OST files
  • A quick search for specific emails or items from the OST folder
  • Restores Exchange distribution lists, appointments, email attachments, and more
  • Converts OST file items to PST, DBX, MBOX, MSG, HTML, MHTML, and PDF formats
  • Restores OST mailbox to Office 365 and various email servers and web mails
  • Splits large PST files after a specified size limit – 1GB, 2GB, and so on
  • Lifetime license validity (no renewal charges)
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Exchange OST Recovery

Expert Reviews

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

Software Features

The software is remarkable in removing corruption from OST files due to its noteworthy features.

Flawless OST File Recovery Flawless OST file recovery

Effortlessly recover single or multiple inaccessible/corrupt OST files and convert them into accessible PST files in a single attempt.

Recover all OST items Recover all OST items

The tool recovers all OST items, including emails with full attachments, posts, appointments, contacts, tasks, meeting requests, journals, notes, etc. It also retrieves email properties like Subject, To, From, SS, BCC, Date & Time.

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

If backups are unavailable, you can still restore the missing or deleted Exchange mailboxes directly from OST files. This tool feature is most useful after facing an Exchange crashes or downtime.

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

Before rebuilding the OST file, make sure to convert those damaged OST data to PST to retrieve unsaved (unsynchronized) data and avoid data loss in the process.

Search and Find OST files Search and Find OST files

Not knowing the exact location of OST files is no longer a trouble since the "Search" function can locate all hidden OST files within a specified folder or drive. It enlists all the OST files in the selected search volume. Additionally, utilize the "Find" option to instantly search email messages by criteria like From, To, Search, Date, and Items.

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

Instead of using the Export/import features, restore OST file data directly to Microsoft 365 and other email servers such as MS Exchange, Novell GroupWise & Lotus Domino.

Recover 25 items free Free recovery of 25 OST items

Download the free trial version to recover corrupt/damaged OST files, preview mailbox items, and save up to 25 items from each folder. This helps to assess the tool's capabilities.

Split PST files Split large OST files

A convenient splitting option to split large OST files into smaller and more manageable PST files in sizes such as 1GB, 1.5GB, 2GB, and more.

Supports all Outlook/Exchange versions Compatible with Outlook/Exchange versions

OST Recovery Software supports all versions of MS Outlook, from Outlook 98 to Outlook 2021/Office 365. It is compatible with all Exchange OST files from Exchange 2016 to 2019.

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How it works?

With the OST Recovery Software, simply add the OST file, fix any errors or corruption, and then save the recovered data in any available format.



Repair OST files of any Outlook/Exchange version on any Windows platform. Check out 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

Evaluate Now

Free trial version

Try the fully functional trial software, which allows you to experience the software’s capabilities and save 25 items per folder. Download it today! Download

Software Features Trial Version Full Version
Preview of All Recovered Data Yes Yes
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 Yes Yes
(24x7) Free Technical Support (Live Chat, Emails & Phone) Yes Yes
Supports All Latest Versions Yes Yes
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OST Recovery

Case Study

Here are some real cases showcasing how our tool has made a difference.

Exchange OST Recovery


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

The tool possesses some extraordinary features that distinguish it from other available tools, such as:

  • Find Message: Makes searching and finding required email messages easy. The messages can be searched in specified folders containing OST files based on 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 the desired location to save the time spent rescanning the damaged OST files.
  • Load Snapshot: Lets the user load a previously-saved snapshot from a 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 the desired format at the preferred 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 a prefix to the store name that will be visible in MS Outlook.

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

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

Before purchasing the full licensed version of any software, users must try it by downloading its free trial version. Using the free demo version, one can easily analyze and judge the software's capabilities and various functionalities, which makes the product different from others. If satisfied with the performance and the accurate results of the software, then the user must decide 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 purchasing the full licensed version. The free demo version works like the full version, accurately recovers data from damaged OST files, and previews recovered data. But it allows users to save up to 25 items per folder only. The user must purchase the full software version to save the entire recovered email data from OST files in PST file format.

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 selected date range(s) emails.

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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