SysTools OST Recovery

Recover Inaccessible OST File & Export into Format

  • Extract & Recover deleted messages from OST files: Emails, Calendars, Contacts
  • View All OST File Messages: Mails, Calendar, Contacts, Tasks
  • Designed to Repair Corrupt OST files easily
  • Apply Filters by Date Range to Export Selective Items / Folders
  • Split File into Small Parts
  • Repair & Restore OST into common file types like
  • Also Restore OST file to
  • Maintains Email Metadata like Read / Unread Status & Message Dates
  • Supports MS Outlook 2016, 2013, 2010, 2007 & All below versions
  • Support OST file of both Compressible & High level Encryption
  • Tested for 20 GB of OST file, Results in Recovery Rate of 2mbps
  • There is no File Size Limit for recovering the OST File.
  • MS Outlook Installation is optional for restoring OST data

Need to Convert Multiple OST Files at Once ? Download Batch OST Converter

Key Features of SysTools OST Recovery Software

restore OST file

Restore OST Data

Outlook OST Repair tool can recover all permanently deleted emails from OST file like; deleted emails, contacts, tasks, calendars etc. After recovering file, the tool save the repaired & make data MS Outlook accessible.
Note: OST File with Unlimited Size get successfuly restored

scan OST File

Scan to Repair OST File

Two scanning modes are available to repair damaged OST file i.e. Quick scan and advanced scan. Quick scan is for less corrupt OST file and advance scan option is for severely corrupt OST file. Now, the software performs Quick scanning by default to repair an OST file .

preview and scan OST Outlook 2013

Preview Data with Item Count

After recovery, the OST Repair software generate an instant preview of all OST file components like: Emails, Contacts, Calendars, Tasks, Notes, etc.; with its item count. Also, it will display emails in normal mail view with associated attachment preview.

maintains meta data

Maintains Meta Data

Office OST Repair tool ensures to keep Meta properties like To, Cc, Bcc, sent date, received date etc.; intact. Also, the original formatting of all items remains as original.

export selected items

Extract Selected Items from OST

On saving selective emails or items from the recovered OST file; check or uncheck respective items and click export. Thus you would be be able to extract emails, contacts & calendars from OST file which is meant for you.

selective file & folder

Export Selective Files / Folder

Select and check the specific file or folder that you want . The software will only export the folders that are being marked with a check.

folder structure

Maintains Email Folder Structure

Outlook OST repair Software maintain the internal folder structure of OST file as it is, while creating file. There will be no changes done in the internal hierarchy of files or folders.

mail filter

Apply OST Mail Filter

While restoring & extracting data from OST file; you can specify date range to apply mail filters. Thus; you can export & save all email or items within these date range.

multiple export options
Multiple Message Export Options

After recovery of OST data, you can extract the OST file into multiple e-mail message formats like; or .eml or .msg. Each of these formats can further be used in various email archiving applications and email clients like; Outlook, Outlook Express, Windows Mail etc.

divide file by size
Divide File by Size

While extracting OST data into , you can apply the split option to break the resultant file into multiple parts. Specify the size in GB and the software will create several files of same size.

save & Load scanned OST filw
Save & Load Scanned OST

The OST file repair tool enables the user to save an OST file once it has been scanned. The scanned file can be later on loaded when required, thus enabling the user to save time from re-scanning the same OST file.

no ms outlook required
Export Data Without Outlook

The outlook OST file repair software gives the provision to extract data from OST file into different file formats with MS Outlook as optional component in the user machine. The user can perform complete recovery and export independent of Outlook.

export report
Get Complete Export Report

After the complete OST file repair restoration; an Export report will get generated by the OST Repair software. The report will contain the details of exported mailboxes and path of saved files. You can save this report in .csv file format for future reference.

different naming
Different Naming Options

If you select .eml or .msg format to extract the OST file emails then software will provide you an option to choose the appropriate naming convention to save the emails. read more

OST Recovery Tool Screenshots
Microsoft OST recovery Software
Step 1: Add OST File
preview ost restore emails
Step 2: Preview OST Emails
OST file recovery tool
Step 3: Export Option
export ost files
Step 4: Select Destination
Watch Live Video of OST Recovery Utility

OST Recovery Software Specifications
OST Recovery Box

System Pre-Requisite

Trial Limitations

Trial Limitation

Download OST Recovery

Installation Uninstallation EULA

System Specifications

  • Support: Windows 10/8.1/8/7 & all below Windows version
  • Processor: 1 GHz Processor (2.4 GHz is recommended)
  • RAM: 512 MB of RAM (1 GB is recommended)

Application Pre-Requisites

  • If you are using Windows 10/8.1/8/7 or Vista, then please launch the tool as "Run as Administrator".

Supported Editions

  • Microsoft Windows – 2000, 2003, 2008, XP, Vista, or Windows 7/8/8.1/10, 2008/2012 (32-bit & 64-bit)
  • MS Outlook – Outlook 2000, 2003, 2007, 2010(32/64 bit), 2013 (32/64 bit), 2016 (32/64 bit)
  • Support recovery of OST file of 32-bit & 64-bit

Request For Software Customization

If you need to customize Outlook OST Recovery or need additional features then, Request Quote

Frequently Asked Question

What is an OST file & where is it located by default?

OST file, also called offline storage table file, is an offline Outlook Data File used by Exchange Server that enables you to work with mail or another data even when server access is not available for Server. OST files are created when Microsoft Exchange Server’s Cached Exchange Mode is enable.

Default Location of OST File:

  • Windows 10 & Windows 8,7: C:\Users\user\AppData\Local\Microsoft\Outlook\
  • Windows XP: C:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook\

By default OST file is created by the name Outlook.ost

How many OST files I can recover at a time?

The software will allow you to add one OST file at a time. Thus, you cannot perform bulk export of OST files. However, you can add OST files one by one & then export all of them simultaneously.

Does this tool enforce any kind of OST file size limitation for Outlook OST recovery ?

No, you can recover any size of OST files with this software. It does not impose any restriction on the size of OST files.

What will be the format of Outlook data file created after export ?

The software will create a UNICODE file which can be used in all latest version of Outlook including MS Outlook 2016, 2013, 2010, 2007, 2003 versions.

Do I need to have working Exchange Server environment to recover OST file Outlook 2016?

No, you do not require an Exchange Server environment to recover corrupt OST file. The software can recover orphan OST file also.

I don't have Microsoft Outlook installed on my machine. Can I still use Outlook OST recovery tool freely ?

To extract data from OST file, it is not necessay to have Outlook installed on your machine and if it is installed then it should also be configured with any valid or dummy profile/account. Learn how to install and configure Outlook in machine.

Can I repair my OST file using SysTools OST recovery tool Freely ?

Yes, software will easily recover corrupted or damaged OST files & will save OST file items into EML / MSG / file formats.

Why Can't I access my OST File normally?

The need of exporting Offline Outlook Data Files may come across in the following conditions:

  1. Change In Environment: In case, change in environment is required. OST file data can be recover & saved in EML or MSG format due to the common availability of Microsoft Outlook & other email client in most of the office and home based environments.
  2. Data Independence: OST file is created when Exchange Cached Mode is activated. Thus, it has a dependence over Microsoft Exchange Server. To break this dependency, you can export Offline Storage Table File (Outlook OST) to Personal Storage Table file.
  3. Overcoming Sync Issues: "Error 8004011D-526-80040115-0" is very commonly faced error, especially by Outlook 2007 users. The error is generated when, the OST file you are trying to synchronize with a mailbox on Exchange, is found to be corrupt. Repairing OST file file frees you from such obligations which results in saving your time as well as efforts.
How To Use Outlook Offline Data File on Other Clients?

SysTools OST Recovery software also provides conversion of data from OST files to EML format. Thus, the output files (MSG or EML) can be used on respective email clients like; MS Outlook (standalone), Windows Live Mail, Outlook Express, Windows Mail, etc.

Does the software make any changes to the data after recovery?
I wanted to perform the recovery of OST file and access it in outlook. Just wanted to know whether the software makes any changes in the data after recovery of OST file or not?

No, the software does not make any changes to the data or the metadata to recover emails from OST files. Contents of your OST file will be kept absolutely safe throughout its recovery process by the software.

Why am I repeatedly getting the error 'Exchange OST is in use and cannot be accessed'?
Before using the software for Exchange OST recovery freely, I closed down Outlook. Then, why does the software keep on telling me that the OST file cannot be accessed as it is in use?

If you are getting the error "Exchange OST is in use and can't be accessed" even after closing all possible applications that may use the file, then probably it must be occurring because one or more of the closed applications is running in the background due to improper closure. Kindly follow the given steps to close them:

  1. Right click on the Taskbar and select 'Start Task Manager' or simultaneously press CTRL+ALT+DEL keys and select 'Start Task Manager'.
  2. Go to the Processes tab.
  3. Click on outlook.exe and click on End Process.

This will help you get rid of the problem successfully without the need of restarting either the application or the computer.

Which versions of the Outlook client does the software support?
I am working with the Exchange and Outlook 2013 (64 bit). I wanted to know how to access corrupted OST file in Outlook 2013? And what all versions of the mail client and mail server are supported by the tool?

SysTools OST Recovery is supportive towards all available versions of the Outlook as well as Exchange Server.
Outlook: 2000, 2003 to 2010, & 2013 (32/64 bit), 2016 (32/64 bit)
Exchange: 5.5, 2003, 2000, 2010, 2007, & 2013 (32 & 64-bit)

What Clients Say

I am so very thankful to your Technician. We had a hard drive crash in our office and we lost all of our calendar entries in Outlook. Being this is a law office, there were many appointments that were crucial and would have been devastating and virtually impossible to recreate. Thanks to your technician, he was able to get all of the appointments back. I cannot give him a high enough praise for extracting data from the OST file. Thank you so much.

Mary Hefner, Uganda

Outlook OST file corruption has completely left me stuck in middle as my entire emails were stored in it. After opting SysTools OST recovery; I am able to restore Outlook OST file data back without any efforts. Thanks to your support team for their help.

Samantha George, Sydney
Why SysTools is Better than Others...

1One of the by far unique capabilities of the tool is to format, despite of the fact that manually doing the export leads to Exchange OST and MAPI profile conflict resulting in compatibility issues.

2Provision of the dual scanning mode for OST files is another productive feature of the software. By default OST files are scanned under Quick Scan however, if the offline data file is severely corrupt, and then Advance Scan can resolve the issue.

3Recovered from an OST can be exported into other file types as well i.e. MSG and EML file type other than Outlook data format. Along with the export into these two formats; a naming convention such as; email subject, date, etc.; can also be set for each email message restored.

Order Now OST Recovery

Get an Overview of OST Recovery Features - FREE and Licensed Version

Features FREE Version FULL Version
Add OST Files
Quick and Advance Scanning Option
View Emails with Attachments
Windows 10 & All Other Previous Windows Version Supported
Recover Deleted Email from OST Files
Split up Large File by Size
Export OST File as , EML or MSG File 25 Items / Folder All Items
Cost FREE $49