--- description: Repair corrupt Outlook PST files and recover your emails with 96% success rate. Download FREE version and try now! title: Outlook Repair Tool. Outlook Recovery Software. PST Repair Tool. image: https://www.datanumen.com/wp-content/uploads/2019/10/datanumen-outlook-repair-102-boxshot.png --- - - - # DataNumen Outlook Repair Our DataNumen Outlook Repair is the ultimate solution for recovering Outlook data and reducing file corruption loss. Our cutting-edge Outlook repair & recovery technology guarantees: –  Recovery of ALL Outlook items with ALL properties –  Support for multiple OS, devices, and file types –  Highest recovery rate **Note:** - DataNumen Outlook Repair is formerly called Advanced Outlook Repair. - For OST file recovery and OST to PST file conversion, please use [DataNumen Exchange Recovery](https://www.datanumen.com/exchange-recovery/). [Free Download](https://download.datanumen.com/downloads/file/dolkr.exe)20+ Years Of Experience [![DataNumen Outlook Repair 10.2 Screenshot](https://www.datanumen.com/wp-content/uploads/2019/10/datanumen-outlook-repair-102-boxshot.png)](https://download.datanumen.com/downloads/file/dolkr.exe) ![1,632 votes, average: 4.90 out of 5](https://www.datanumen.com/wp-content/themes/datanumen/images/rating_45.png "1,632 votes, average: 4.90 out of 5") **4.90 / 5 (from 1,632 votes)** - ### Overview - ### Features -

How to Recover

- ### More Information - ### Related Products ## Why DataNumen Outlook Repair? --- *![#1 Recovery Rate]()* #### #1 Recovery
Rate *![10+ Million Users]()* #### 10+ Million
Users *![20+ Years of Experience]()* #### 20+ Years of
Experience *![100% Satisfaction Guarantee]()* #### 100% Satisfaction
Guarantee ## Recover Much More than Our Competitors --- DataNumen Outlook Repair vs. Inbox Repair tool (scanpst.exe), Stellar Repair For Outlook, Recovery Toolbox for Outlook, etc. ### Average Recovery Rate [![Comparison Chart]( "Comparison Chart")](https://www.datanumen.com/outlook-repair-compare/) [Learn more about how DataNumen Outlook Repair smokes the competition](https://www.datanumen.com/outlook-repair-compare/) ## Our Customers' Testimonials ![5 star rating]( "5 star rating") "Outlook Repair" saved my life Wow!!!!! Several of my Outlook PST files were corrupted and Microsoft left me without any solution. The repair ... Read more "Outlook Repair" saved my life Wow!!!!! Several of my Outlook PST files were corrupted and Microsoft left me without any solution. The repair tool integrated in Outlook was capable of nothing (really nothing). The price I paid for the DataNumen tool is an investment I won't regret. I saved about 5000 emails with very few really lost messages (and without having to be an IT expert). A pity they didn't think to develop an operating system... Anne D. Retired IT professional with 15 years’ experience Brussels, Belgium September 19, 2026 ![5 star rating]( "5 star rating") **About myself:** My name is Roberto, I am a computer forensics professional working independently since 2008. I ... Read more **About myself:** My name is Roberto, I am a computer forensics professional working independently since 2008. I live in Chile, close to Colina in the Región Metropolitana. As a forensic investigator working for many many different customers and for the sake of their privacy, I maintain a low profile with no web site and a typical gmail email account. **About my use of DataNumen products:** I choose Outlook Repair and Exchange Recovery from DataNumen as the best tools to fit a step in the process of doing forensics analyses of emails. In practice when dealing with dozens of PST or OST files, it is not uncommon to stumble into files that had a certain degree of internal corruption, and of course they also hold deleted emails that should be recovered for the analysis to be as complete as possible. So now, whenever I have to process those kinds of email files, the first mandatory step is to run them through DataNumen software to get a "fixed" set. Very nice that DataNumen can do batch processing. Load all files once and run. In a high performance machine with 32GB Ram and 2x 2TB of M.2 storage, this can require from one to three days non stop, depending on the case. Too bad DataNumen software does not use all machine cores to speed up things, but now they placed this idea into their request list. Once done, I create a forensic image with the fixed files, and then proceed to digest that image with X-Ways Forensics, my forensic tool of choice. Roberto rpetitpas (at) gmail.com Colina, Chile March 8, 2024 ![5 star rating]( "5 star rating") You guys have been great – really appreciate all the work and effort. Has paid off as file seems to work perfectly now. Very impressive ... Read more You guys have been great – really appreciate all the work and effort. Has paid off as file seems to work perfectly now. Very impressive customer service and tech support. Many many thanks, David AKL Research & Development Ltd United Kingdom September 27, 2022 ![5 star rating]( "5 star rating") Suddenly my Microsoft Outlook cannot start. Your app repair Outlook file with a very simple click. Really amazing! Siva Tamboli India March 15, 2022 ![5 star rating]( "5 star rating") Outlook got fouled up, right after a Windows update my Email program Outlook stopped working.   I used datanumen product to rearrange the email ... Read more Outlook got fouled up, right after a Windows update my Email program Outlook stopped working.   I used datanumen product to rearrange the email folders properly and it worked.   All I had to do was run the program to fix the data, changed the data file name and run Outlook.   Presto it worked.  Many thanks Craig Self-employed November 20, 2020 ![5 star rating]( "5 star rating") I'm impressed with the ease of use and the quick recovery of the file. Altough all, I don't need it anymore, so I unistalled it after two file ... Read more I'm impressed with the ease of use and the quick recovery of the file. Altough all, I don't need it anymore, so I unistalled it after two file recoveries. Thanks a lot. Víctor Ramón R. G. Home Work Leioa, Bizkaia, Spain September 30, 2020 ![5 star rating]( "5 star rating") Thank you for the product for small people with gigantic problem. I used your Outlook repair. Lucy Gold Retired Scientist Paris, France September 21, 2020 ![5 star rating]( "5 star rating") Perfect, awesome. If only other people were this efficient. Congratulations. Nilson Ghelardi Texas, USA September 1st, 2020 ![5 star rating]( "5 star rating") I had to send a message to thanking your company for this great Datanumen Outlook repair product! I was using another program to sync my outlook ... Read more I had to send a message to thanking your company for this great Datanumen Outlook repair product! I was using another program to sync my outlook (Companion Link) and my phone and the program malfunctioned and wiped my newer data on my computer with the older data from my phone.   I didn't have a backup of the outlook file and I was so frustrated to lose very important updates to notes. I spent pretty much all of a couple days thinking and figuring out a way to fix this through every method possible (previous versions, other recovery software, other online tips) and it seemed impossible, but luckily found the Datanumen product and was able to repair/recover the lost notes!  With being a small business and going through some of life's difficult times I was extremely down, sad, angry when I thought my outlook data was overwritten by that error and frustrated with no way to get it back and was extremely pleased to find this Datanumen program and have it work to restore my data, it's amazing and the software was intuitive and easy to use.  This is such a great company and just wanted to let everyone know they make a difference in peoples lives for the better!!! Thank you so much again. Alan Rudy Freedom Real Los Angeles, CA, USA July 17th, 2020 ![5 star rating]( "5 star rating") magic software Fixed another file of mine the Microsoft classified as "corrupt". Million thank yous. Cavan McDonald Retired St. Albans. UK July 9th, 2020 ![5 star rating]( "5 star rating") Sheer magic - fixed a file the scanpst.exe could not even recognise as an Outlook Mailbox. Grateful thanks for a terrific product. Cavan McDonald United Kingdom June 2nd, 2020 ![5 star rating]( "5 star rating") I would like to offer my thanks to DataNumen inc. for your help and your software that really did its job and allowed a not very experienced person ... Read more I would like to offer my thanks to DataNumen inc. for your help and your software that really did its job and allowed a not very experienced person to recover his Outlook 2007 PST files. Great Product! Pete M. Retired Calgary, AB, Canada May 8th, 2020 ![5 star rating]( "5 star rating") Your tool was instrumental in recovering all my wife’s email. Thank you so much to you and your entire team for providing this lifesaving and easy ... Read more Your tool was instrumental in recovering all my wife’s email. Thank you so much to you and your entire team for providing this lifesaving and easy to use tool!! Ken Mantey Retired GE Lighting Chesterland, OH, USA August 8th, 2019 ![5 star rating]( "5 star rating") Thank you very much for you generous assistance and I appreciate your quick responses. I would definitely recommend your product. Tony V May 31, 2019 ![5 star rating]( "5 star rating") Hello guys This message serves as a BIG THANK YOU for your brilliant Outlook repair tool. My customer had been experiencing multiple power outages ... Read more Hello guys This message serves as a BIG THANK YOU for your brilliant Outlook repair tool. My customer had been experiencing multiple power outages which caused Outlook pst to become corrupt. Scanpst came up with error referring to disk problems. I googled this error and luckily stumbled upon your product. I installed and ran the tool which took over 2 hours to complete. The end result was a perfectly working Outlook which was much faster than before! My customer is over the moon as it is a business account relying heavily on email. Thank you for a great product, I will definitely be recommending it to all my IT colleagues. For your information, the environment is as follows: Desktop pc (older model IBM) with dual-core cpu, 4Gb ram, Windows 7 professional and Outlook 2007. PST is approx. 4.5Gb. Please keep up the great work. Kind regards Steve IT Professional Durban, South Africa February 18, 2019 ![5 star rating]( "5 star rating") Remerciements. Facile et Efficace Abdellatif FAJR General Manager Business Applications Casablanca Morocco December 10, 2019 ![5 star rating]( "5 star rating") A very big thank you. MS Office upgrade crashed my computer and I had to delete and reinstall. In the process Outlook did not accept the old .ost ... Read more A very big thank you. MS Office upgrade crashed my computer and I had to delete and reinstall. In the process Outlook did not accept the old .ost file and I lost all my emails stored in sub-folders (local computer only). This is a failure on behalf of Outlook, not to re- create the sub-folders on the server. After 6 hours of panic, I found your site and downloaded the software, less than 30 minutes later all was good again.All emails safe and accessible. THANK YOU. Eric Engelbrecht Auckland, New Zealand February 18, 2019 ![5 star rating]( "5 star rating") G'day DataNumen I downloaded your outlook repair software because of constant error messages about my outlook.pst file having not closed properly ... Read more G'day DataNumen I downloaded your outlook repair software because of constant error messages about my outlook.pst file having not closed properly on last use.  You software worked perfectly.  My pst file grew from 1.9gb to 2.45gm with 'lost data' that had been recovered and thoughtfully placed into two 'recovered' folders (not just dumped in the in box) for me to browse.  It took less than 10 minutes for a complete recovery and scan of the recovered mail items. Again I say thank you for providing such good software that does what it says it does with no limitations for private use.  I highly recommend this tool for all computer users tool box. Peter Jones Home computer user Adelaide, Australia June 27, 2019 ![5 star rating]( "5 star rating") A really great piece of software that is super thorough and and delves deep to find deleted and lost emails. I managed to recover an eminence amount ... Read more A really great piece of software that is super thorough and and delves deep to find deleted and lost emails. I managed to recover an eminence amount of information that no other software that I used could. I really appreciated being able to use this application privately at no cost. Thanks Datanumen! Ant Lee Auckland, New Zealand August 23, 2019 ![5 star rating]( "5 star rating") This software is extremely good. I am really thankful to you for providing such an important tool (DataNumen Outlook Repair v 1.2 full version) for ... Read more This software is extremely good. I am really thankful to you for providing such an important tool (DataNumen Outlook Repair v 1.2 full version) for public use. Let me know if you could provide the tools some thing beyond this. Mohammed Meeran DATEL Systems & Software FZ LLC Dubai. U.A.E. ![5 star rating]( "5 star rating") It finished up beautifully. Ryan Foote Nexus IT Consultants Park City, Utah, USA ![5 star rating]( "5 star rating") Thanks for the input. I figured out what to do in the meantime. Recovered almost all of my lost email. Thanks for a good product... Best regards, Justin Moss Applications Engineer Metton America, Inc. Houston, TX, USA ![5 star rating]( "5 star rating") Hello, I received the DVDRom with the zipped pst-file. I have been able to extract it and all is working well again.I wish to thank you for the ... Read more Hello, I received the DVDRom with the zipped pst-file. I have been able to extract it and all is working well again.I wish to thank you for the kind an splendid support and all the help you have given me. If it wasn't for you and AOR I probably wouldn't have recovered the data in the file.Kind regards, Robin De Roeck Woonst BVBA Geraardsbergen, Belgium ![5 star rating]( "5 star rating") Thank You very much for your help - I really appreciate it. An employee in Procter & Gamble USA ![5 star rating]( "5 star rating") Hi, thankyou for responding. I have managed to sort it out myself since the first email, so sorry to have bothered you. BTW, love the product. Murrat Australia ![5 star rating]( "5 star rating") Hello, Its it possible to specify the location and name of each file in the Batch Repair tab? This is already possible in the Repair tab, when ... Read more Hello, Its it possible to specify the location and name of each file in the Batch Repair tab? This is already possible in the Repair tab, when only processing one file, but it would be really usefull if it were possible to edit the output file details in batch repair. Great product by the way! AOR has recovered most of the items from a very important 6GB PST file. My previous attempts with SCANPST had only recovered 500mb! Kind regards, Mark Humphrey Network Manager CB Richard Ellis Ltd Toronto, Canada ![5 star rating]( "5 star rating") Time ago I buy Datanumen Outlook Repair and I am happy with it, using it form time to time. Now I need to recover deleted emails from a bunch of NSF ... Read more Time ago I buy Datanumen Outlook Repair and I am happy with it, using it form time to time. Now I need to recover deleted emails from a bunch of NSF Lotus Notes file. I thought you might have a good product but alas you dont have anything for Lotus Notes. Well, since you do things right, why not a Datanumen NSF Repair? Best regards, Roberto Roberto Petitpas rpetitpas@gmail.com ![5 star rating]( "5 star rating") Thanks Alan, Repair worked almost perfect ... I did´t expect that well. Thanks so much. Helmut Helmut Demmelhuber Demmelhuber Consulting Tübingen, Germany Sep 13th, 2018 ![5 star rating]( "5 star rating") Thanks so much for you support --- it worked by just creating a new profile. Again Thanks, Owner of CARisma Houston, TX, USA May 23rd, 2018 ![5 star rating]( "5 star rating") I just wanted to say Thank You for the software. My Outlook data file appears to be mostly fixed. I needed to inspect and delete a ton of entries ... Read more I just wanted to say Thank You for the software. My Outlook data file appears to be mostly fixed. I needed to inspect and delete a ton of entries but, I think, I recovered most of my data. I will never know what I have lost permanently! Ahmed Qadeer Naperville, IL, USA Dec 4th, 2018 ![5 star rating]( "5 star rating") Expensive but it did everything promised including the attachments So how much is that worth? Highly recommended! Brock Croome Architect North Vancouver, BC, Canada Nov. 1st, 2015 ![5 star rating]( "5 star rating") Advanced Outlook Repair completely repaired a 19GB Outlook 2007 .pst with multiple folders from over 15 years. It became corrupted after a hard ... Read more Advanced Outlook Repair completely repaired a 19GB Outlook 2007 .pst with multiple folders from over 15 years. It became corrupted after a hard shutdown, and would not open, even in safe mode. I heard about your tool from "chcw" on ExpertsExchange.com and from the repair percentages comparison table between tools on the Datanumen.site. I had made a copy of the .pst, and tried with no luck with the Microsoft scanpst.exe. 3rd party tools had helped years ago with Outlook Express conversion so I looked online. Advanced Outlook Repair was the only one getting affirmative positive reviews for complicated cases, and they showed examples of such, so I found a coupon and bought it. The first pass said the original file was held open by another source (even though rebooted). I next tried it against the copy, and within minutes (about 20%), my Outlook popped open - with complete up to date folders and emails. It scared me because I thought I had touched something and shut it. A few minutes later, that Joanne Ashland Houston, TX, USA Nov. 1st, 2015 ## Extremely Simple Interface --- [![screenshot]()](https://www.datanumen.com/wp-content/uploads/2019/10/datanumen-outlook-repair-102.png) #### Repair [![screenshot]()](https://www.datanumen.com/wp-content/uploads/2019/10/datanumen-outlook-repair-102-batch.png) #### Batch Repair [![screenshot]()](https://www.datanumen.com/wp-content/uploads/2019/10/datanumen-outlook-repair-102-options.png) #### Options ## Solution for Following Common Errors and Problems in Outlook PST File --- ![solutions]() - [Inbox Repair Tool Cannot Recover Items](https://www.datanumen.com/outlook-repair/errors/inbox-repair-tool-not-recovered/) - [Inbox Repair Tool Hangs](https://www.datanumen.com/outlook-repair/errors/inbox-repair-tool-hang/) - [The File Is not a Personal Folders File](https://www.datanumen.com/outlook-repair/errors/not-personal-folders/) - [Errors have been detected in the file xxxx.pst…](https://www.datanumen.com/outlook-repair/errors/errors-detected-pst/) - [An unexpected error prevented access to this file. Use ScanDisk to check the disk for errors, and then try using the Inbox Repair tool again.](https://www.datanumen.com/outlook-repair/errors/inbox-repair-tool-fail/) - [Oversized PST file problem (PST file size reaches or exceeds the 2GB limit).](https://www.datanumen.com/outlook-repair/errors/2gb-pst/) - [Outlook emails and other items are deleted by mistake.](https://www.datanumen.com/outlook-repair/errors/outlook-deleted/) - [Forget or lose the password for the encrypted PST file.](https://www.datanumen.com/outlook-repair/errors/outlook-password/) [MORE](https://www.datanumen.com/outlook-repair-outlook-problem/) --- [Free Download](https://download.datanumen.com/downloads/file/dolkr.exe)20+ Years Of Experience [Buy Now](https://www.datanumen.com/outlook-repair-order/)100% Satisfaction Guarantee ## Main Features --- - Support 32bit and 64bit Microsoft Outlook 97 to 2021 and Outlook 365, i.e., Outlook for Office 365 and Microsoft 365. - Recover [PST/OST files](https://support.microsoft.com/en-us/office/introduction-to-outlook-data-files-pst-and-ost-222eaf92-a995-45d9-bde2-f331f60e2790) from any OS(Windows, macOS, iOS, Android, etc.) and any device(desktop, tablet, smartphone, etc.). - Recover mail messages, folders, posts, calendar items, appointments, meeting requests, contacts, distribution lists, tasks, task requests, journals, and notes in PST files. All properties, such as subject, message body, to, from, cc, bcc, date, etc., are recovered. - Recover emails in plain text, RTF, and HTML format. - Recover attachments, including the documents and images attached to messages and embedded in HTML bodies. - Recover embedded objects, such as another email, Excel Worksheets, Word documents, etc. - Repair Outlook PST files that Inbox Repair tool (scanpst.exe) fails to fix and other PST repair tools cannot repair. - [Recover deleted Outlook items, including mail messages, folders, posts, calendars, appointments, meeting requests, contacts, distribution lists, tasks, task requests, journals, and notes.](https://www.datanumen.com/outlook-repair/errors/recover-outlook-deleted/) - [Recover oversized 2GB PST files.](https://www.datanumen.com/outlook-repair-recover-2gb-pst/) - [Split the output PST file into several small files.](https://www.datanumen.com/outlook-repair-split-pst-file/) - [Recover password-protected PST files,](https://www.datanumen.com/outlook-repair/errors/outlook-password/) [even if the password is lost](https://www.datanumen.com/outlook-repair/errors/outlook-password/) [. Both compressible encryption and high encryption(or best encryption) are supported.](https://www.datanumen.com/outlook-repair/errors/outlook-password/) - [Convert PST file from MS Outlook 97-2002 format into Outlook 2003-2019/Outlook 365 format](https://www.datanumen.com/outlook-repair-convert-pst-format/), and [vice versa](https://www.datanumen.com/outlook-repair-convert-pst-format/). - Generate fixed PST file in Outlook 97-2002 format and Outlook 2003-2019/Outlook 365 format. - [Fix the "Can't move the items" error in Outlook PST files](https://www.datanumen.com/outlook-repair/errors/cant-move-the-items/). - Fix the problem that Outlook PST/OST file is slow or unresponsive. - Comprehensive switches to control the scan, recovery, and output process. - [Recover Outlook data from any healthy or damaged](https://www.datanumen.com/outlook-repair-disk-file-recovery/) [disk files, image files, and backup files](https://www.datanumen.com/outlook-repair-disk-file-recovery/) [.](https://www.datanumen.com/outlook-repair-disk-file-recovery/) - [Support to recover Outlook data from temporary files created by Outlook when data disaster occurs](https://www.datanumen.com/outlook-repair-temporary-file-recovery/). --- [Free Download](https://download.datanumen.com/downloads/file/dolkr.exe)20+ Years Of Experience [Buy Now](https://www.datanumen.com/outlook-repair-order/)100% Satisfaction Guarantee ## How to Use DataNumen Outlook Repair to Recover Corrupt Outlook PST Files --- [See Video Tutorial](https://youtu.be/A1iB6ZfB4kI) Start DataNumen Outlook Repair. ![DataNumen Outlook Repair 10.2]( "DataNumen Outlook Repair") Note: Make sure you shut down Microsoft Outlook before you start. Also, close other applications that could access the PST file. Choose the corrupt or damaged Outlook PST file that you would like to repair: ![Select Source File]( "Select Source File") To choose the file, input its name directly, or use the ![Browse]( "Browse") button to locate the file. You can also use the ![Find]( "Find") button to search for the file. Specify the version of Outlook for the PST file in question if you are aware of it. You can use the combo box ![Select Format]( "Select Format") to do this. There are a number of available formats such as Outlook 2013-2019/Office 365 PST file. You can also choose “Auto Determined” for the format. If you do this, DataNumen Outlook Repair will analyze the source file to see what the file format is, which takes more time. DataNumen Outlook Repair automatically saves the recovered data into a brand-new PST file xxxx\_fixed.pst, where xxxx represents the name of the source PST file. For example, Outlook\_fixed.pst would be the fixed file name if Outlook is the name of your source file. However, you can rename the fixed file if you would like to: ![Select Destination File]( "Select Destination File") You can directly enter the file name or use the ![Browse]( "Browse") button to choose the file by browsing. You have the option to choose the format of the fixed PST file in the combo box ![Select Format]( "Select Format") which is next to the edit box. There are two possible formats for you to select: Outlook 97-2002 and Outlook 2003-2019/Office 365. DataNumen Outlook Repair will choose a file format compatible with the Outlook version on the local computer automatically if you leave the format as “Auto Determined.” Click the ![Start Repair]( "Start Repair") button. After that, DataNumen Outlook Repair will start repairing your source file using its sophisticated algorithms and show a progress bar: ![Progress Bar]( "Progress Bar") Once the repair process is complete, you will see a message that looks like this if it was successful: ![Success Message Box]( "Success Message Box") Hit “OK” and you should be able to open the fixed file with MS Outlook or other email clients that are compatible with the file. The entire hierarchy for the file will be rebuilt for the fixed file so that emails and other objects will be placed in their original folders. Lost & found objects will be put in folders named Recovered\_Groupxxx. ## More Information --- ![Specifications]() Specifications ![Case Studies]() Case Studies ![FAQ]() FAQ ![Help Documentation]() Help Documentation | **Version** | 10.2 ([Version History](https://www.datanumen.com/news/)) | | --- | --- | | **Release Date** | April 15th, 2025 | | **Bitness** | 32-bit, 64-bit | | **Supported File Types** | PST, OST | | **Supported Outlook Versions** | Outlook 97–2021; Outlook for Office 365; Microsoft 365 | | **Recoverable Objects** | Email messages, attachments, embedded objects, folders, posts, calendar items, appointments, meeting requests, contacts, distribution lists, tasks, task requests, journals, and notes | | **Deleted Data Recovery** | Deleted email messages and other objects | | **Password-Protected Files** | Supported | | **Oversized Files** | Supported | | **Split Output Files** | Supported | | **File Format Conversion** | Supported | | **Disk Image File Recovery** | Supported | | **Temporary File Recovery** | Supported | | **Supported Languages** | 95 languages | #### Requirements | **Operating System** | Windows | | --- | --- | | **Processor** | Intel or equivalent (x86, x64) | | **Memory** | 64 MB minimum (4 GB recommended) | | **Disk Space** | 37 MB | [

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](https://www.datanumen.com/outlook-repair/case-studies/sanofi/) [More Case Studies](https://www.datanumen.com/case-studies/) ### What is a PST file? PST(Personal Storage Table) file is also called Personal Folders File. It is a kind of Outlook data file. Outlook uses it to store Outlook email messages and other mailbox items for pop3 email accounts, such as Outlook.com or hotmail.com. Our Outlook recovery tool is mainly designed to repair corrupt PST data files. PST files have two variants, i.e., Unicode format and ANSI format. Our tool supports both formats. And can convert between these two formats when necessary. ANSI format has 2GB size limit. So Outlook 2003 and higher versions all use Unicode format. We also recommend you to convert all existing PST files to Unicode format, unless you are still using Outlook versions lower than 2003. ### What is an OST file? OST file(Offline Storage Table) is also called Offline Folders File. It is another kind of Outlook data file. Microsoft Outlook uses it to store data for email accounts other than pop3, such as accounts on Microsoft Exchange servers. ### Can your Outlook PST repair software repair OST files? Yes, our Outlook recovery software can repair OST files. You can also use [DataNumen Exchange Recovery](https://www.datanumen.com/exchange-recovery/) to do the task, as DataNumen Exchange Recovery is mainly designed for OST file data recovery. It can also convert OST to PST files when the Exchange server crashes or is unavailable. ### Why PST file will get corrupted? How to repair PST files and recover Outlook emails? There are many reasons that will lead to PST file corruption, such as power failure, hard disk failure, viruses, oversized PST files(too large PST files, file larger than the size limitation, etc.), abnormal closing(you do not close Outlook properly), etc. We have collected [a list of the common reasons](https://www.datanumen.com/outlook-repair/errors/corrupt-pst/). For oversized PST files, you can enable the AutoArchive configuration to prevent such an issue. We also recommend you to have our Outlook data recovery tool on hand. Thus whenever you encounter a corrupted PST file, you can use our PST file repair tool to recover file data for you. ### Which versions of Outlook are supported? Currently, our app supports Microsoft Outlook 97, Outlook 98, Outlook 2000, Outlook 2002, Outlook 2003, Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019, and Outlook 365. ### Which versions of Windows are supported? Our app supports Windows 95/98/ME/NT/2000/XP/Vista/7/8/8.1/10/11 and Windows Server 2003/2008/2012/2016/2019. ### What are your recovery software’s advantages over other similar apps? You can see a complete  [competitive comparison](https://www.datanumen.com/outlook-repair-compare/) of our product with other similar MS Outlook PST repair apps in the market. Based on the comparison, our product has the best recovery rate and the most comprehensive functions. ### How to uninstall DataNumen Outlook Repair? There are two methods to uninstall DataNumen Outlook Repair. #### METHOD 1: 1. Click the **Start** menu. 2. Go to the **Control Panel**. 3. Select**Programs>** **Uninstall a program.** 4. Press and hold (or right-click) on **DataNumen Outlook Repair(Demo Version)** or **DataNumen Outlook Repair(Full Version)** and select**Uninstall**. Then follow the instructions on the screen to uninstall the program. #### METHOD 2: 1. Click the **Start **menu**.** 2. Click**All Programs**. 3. Find the**DataNumen Outlook Repair** program group, and click it. 4. Click **Uninstall DataNumen Outlook Repair** to uninstall the app. ### Can you repair Outlook PST files online? We’re sorry, but we do not yet offer an online repair service. ### I cannot open Outlook. How to repair Outlook? Many possibilities may make you fail to open the Outlook app. Therefore, we recommend you [diagnose the problem](https://www.datanumen.com/outlook-repair/errors/diagnose-outlook-problem/) with some troubleshooting methods to determine the reason. #### 1. Fix corrupted PST file If the problem comes from the corruption of the Outlook PST file, then our Outlook PST repair tool will be able to fix it. Microsoft also provides a built-in Inbox Repair Tool(scanpst.exe), but it only works for very few cases. #### 2. Repair Outlook installation If the problem comes from the installation of your Outlook app, then you can repair Office or Office 365 via the following troubleshooting steps: 1. Click the **Start** menu. 2. Go to “**Control Panel**”. 3. In the “**Programs”** category, select “**Uninstall a program**”. 4. Select the Office product you want to repair, and click “**Change”**. 5. If your Office installation is “**Click-to-Run”** type, then in the pop-up “**How would you like to repair your Office Programs”** dialog box**,** you can select the **Quick repair **option to replace the corrupt files in the current Microsoft Office installation, including those for Outlook. If that does not work, then you can select the **Online repair** option to perform a thorough repair. The online repair will reinstall Office without affecting the existing settings. 6. If your Office installation is “**MSI-based”**, then in “**Change your installation”**, click the **Repair** button to repair the Office installation. 7. If both quick repair and online repair do not work, then you can try to uninstall Office and then reinstall it manually. #### 3. Repair Outlook Profile If the problem comes from your Outlook profile, then you can repair it via the following steps: 1. Open Outlook. 2. In your Outlook,  click **“File”**. 3. Then click **“Account Settings”**> **“Account Settings”**. 4. In the **“Email”** tab of the pop-up window, select the profile, then click the **Repair **button. 5. Follow the instructions to repair the Outlook profile. 6. Restart the Outlook application. #### 4. Disable Add-ins If the problem comes from the Add-ins, then you can turn off them temporarily, as follows: 1. Open Outlook. 2. In your Outlook, click **“File”.** 3. Then, click **“Manage Add-ins”**. 4. In the **“Manage Add-ins”** section, find the **“Turned on”** column, then uncheck to disable the add-in. #### 5. Update Outlook to the Latest Version You can also use Windows Update to update your Outlook to the latest version, which may be able to fix Outlook problem. #### 6. Use Microsoft Support and Recovery Assistant You can use [Microsoft Support and Recovery Assistant](https://aka.ms/SaRA-OutlookDisconnect) to diagnose your Outlook problem. #### 7. Restore Your System If all the above solutions do not work, you can use the “System Restore” feature in the Windows operating system to restore your system to an earlier workable state. Note in Windows 10, this feature is disabled by default. You must enable it manually beforehand. #### 8. Restore Outlook PST file If you have backed up your Outlook PST file in the past, you can also try to restore the backup PST file. This method is faster than method 7, since you only need to restore Outlook PST file, not the whole system. Note: We have tested the above solutions with Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019, and Outlook 365. ### Where is DataNumen Outlook Repair installed? By default, our Outlook PST repair software will be installed in the following directory in a 64bit Windows system: **C:\\Program Files (x86)\\DataNumen\\DataNumen Outlook Repair\\** or in the following directory in a 32bit Windows system: **C:\\Program Files\\DataNumen\\DataNumen Outlook Repair\\** ### Does your Outlook recovery software support Windows 10 or Windows 11? Yes, the latest version of DataNumen Outlook Repair fully supports 32bit and 64bit versions of Windows 10 and 11. ### Will Microsoft support be able to fix my corrupt PST file? In general, Microsoft support will suggest you use the built-in Outlook PST repair tool, i.e., Inbox Repair Tool(scanpst.exe), to scan and repair corrupt PST files. If that does not work, they will also use our DataNumen Outlook Repair to repair Outlook PST files. ### Do you support Outlook for Mac? Sorry but currently, Outlook for Mac is not supported yet, as it uses a different file format .OLM(Outlook for Mac) to store data. ### How much time will it consume to repair Outlook files? Our file recovery tool will use a very complex algorithm to analyze every byte of the PST data file. So the repair time depends on many factors. Below are some of them: 1. The file size. The larger your corrupt Outlook PST file is, the longer it will cost to repair. For instance, a 20GB PST will typically need about 2 to 3 hours to repair. 2. The complexity of the file. If there are many Outlook emails, folders, and other objects in your file, it will usually take more time to repair it. Also, a recently created file is usually less complex than one created several years ago. So it will generally take less time to fix a relatively new file. 3. The severity of the PST file corruption. For badly damaged PST files, it will take more time. If the PST file corruption is not severe, you can enable the “Fast scan and recovery” option in the “Options” tab to speed up the PST recovery process. 4. The performance of your computer. A computer with a faster CPU,  a bigger memory, and a faster SSD will usually repair faster. Also, the latest Windows system will be able to utilize the full capability of the hardware, so it will also perform better. 5.  Bitness of your Windows system and Outlook. We recommend you to run 64bit DataNumen Outlook Repair with 64bit Windows and Outlook, since DataNumen Outlook Repair can use all available memory if your system has more than 4GB memory, significantly improving the performance and speeding up the recovery process. 6. Don’t run any other application during the repair process. A large PST file will require a lot of time and resources to fix. Therefore, please close any other apps before starting to repair the damaged PST file, to speed up the repair process. ### How to recover deleted emails in Outlook? There are several methods to recover deleted emails and other items: #### 1. Undelete emails via Ctrl + Z After you delete your email, try to press Ctrl + Z do undelete the email. You can also use this method to recover deleted items. #### 2. Restore emails from the **Deleted Items** folder If your PST file has a **Deleted Items** folder. After you delete your email, you can try to find it in that folder and restore it back. If your PST file does not have a **Deleted Items** folder, then check if it has a **Trash** folder, you can try to recover deleted items from that folder as well. ### 3. Use the Recover Deleted Items Command If the above methods fail, you can try to use the **Recover Deleted Items** command to recover your items, as below: 1. Only accounts using Microsoft Exchange Server support such a function. 2. Make sure you are online and connect to the Exchange server. 3. Click **Folder**. 4. Click **Recover Deleted Items**. 5. Select the items you want to restore, and click **Restore Selected Items**. 6. The selected items will be restored and put back in their original folder. If the items are deleted from the **Deleted Items** folder, the restoration will also put them back in that folder. If you cannot see the **Recover Deleted Items** option, then your account does not support such a function. #### 4. Use our tool If all the above methods fail, then you can use our tool to [recover the deleted emails](https://www.datanumen.com/outlook-repair/errors/outlook-deleted/). ### Can I pause/resume the repair process? Sorry but that is not possible. If you start a repair process, the only option is to stop it. Later if you want to re-repair the same Outlook file, you need to start over and initiate the repair process from the beginning. ### Are there any free tools for PST recovery? Yes, MS Outlook has a free built-in  [Inbox Repair Tool(scanpst.exe)](https://support.microsoft.com/en-us/office/repair-outlook-data-files-pst-and-ost-25663bc3-11ec-4412-86c4-60458afc5253) which can be used to repair Personal Folders files(PST) with minor corruptions. For different versions and bitness of Outlook and Windows, the locations for scanpst.exe are also quite different. You can utilize the following table to find the directories of scanpst.exe: | | Install Type | 32bit Windows | 64bit Windows | | --- | --- | --- | --- | | Office 365/Windows 365(32bit) | Click to Run | C:\\Program Files\\Microsoft Office\\root\\Office16 | C:\\Program Files (x86)\\Microsoft Office\\root\\Office16 | | Office 365/Windows 365(64bit) | Click to Run | N/A | C:\\Program Files\\Microsoft Office\\root\\Office16 | | Outlook 2016/2019(32bit) | Normal | C:\\Program Files\\Microsoft Office\\Office16 | C:\\Program Files (x86)\\Microsoft Office\\Office16 | | Outlook 2016/2019(64bit) | Normal | N/A | C:\\Program Files\\Microsoft Office\\Office16 | | Outlook 2016/2019(32bit) | Click to Run | C:\\Program Files\\Microsoft Office\\root\\Office16 | C:\\Program Files (x86)\\Microsoft Office\\root\\Office16 | | Outlook 2016/2019(64bit) | Click to Run | N/A | C:\\Program Files\\Microsoft Office\\root\\Office16 | | Outlook 2013(32bit) | Normal | C:\\Program Files\\Microsoft Office\\Office15 | C:\\Program Files (x86)\\Microsoft Office\\Office15 | | Outlook 2013(64bit) | Normal | N/A | C:\\Program Files\\Microsoft Office\\Office15 | | Outlook 2013(32bit) | Click to Run | C:\\Program Files\\Microsoft Office\\root\\Office15 | C:\\Program Files (x86)\\Microsoft Office\\root\\Office15 | | Outlook 2013(64bit) | Click to Run | N/A | C:\\Program Files\\Microsoft Office\\root\\Office15 | | Outlook 2010(32bit) | Normal | C:\\Program Files\\Microsoft Office\\Office14 | C:\\Program Files (x86)\\Microsoft Office\\Office14 | | Outlook 2010(64bit) | Normal | N/A | C:\\Program Files\\Microsoft Office\\Office14 | | Outlook 2010(32bit) | Click to Run | C:\\Program Files\\Microsoft Office\\root\\Office14 | C:\\Program Files (x86)\\Microsoft Office\\root\\Office14 | | Outlook 2010(64bit) | Click to Run | N/A | C:\\Program Files\\Microsoft Office\\root\\Office14 | | Outlook 2007(32bit) | Normal | C:\\Program Files\\Microsoft Office\\Office12 | C:\\Program Files (x86)\\Microsoft Office\\Office12 | This looks a bit complex. So a better way is just to search for “scanpst.exe” on your local computer. As long as you have installed Outlook, you will be able to find it. After finding the scanpst.exe, double-click to start it and fix Outlook files. However, Inbox Repair Tool(scanpst.exe) only works for very few cases. More specifically, it can only repair PST files with minor corruptions. For badly damaged PST files, it will  [crash, stop working, or just report an error that it fails to repair the file](https://www.datanumen.com/outlook-repair-outlook-problem/#scanpst-fails). In such cases, you need to use  [our Outlook PST repair tool](https://www.datanumen.com/outlook-repair/) instead. For corrupt Offline Storage File(OST), Microsoft has a scanost.exe tool to repair OST files. ### Do I need to close Outlook when using your PST recovery tool? Yes, we recommend you to close all applications, including Microsoft Outlook application, other Office apps, such as PowerPoint, etc. before using our PST file repair tool to repair Outlook files and recover Outlook emails. ### Do I need to have an email account in Outlook to use your tool? Yes, we recommend you to create an email account, even if you do not send/receive any emails with it. ### How to find the corrupted PST files to be repaired? You can do as follows: 1. Click the **Start menu**. 2. Go to **Control Panel**. 3. Search for **Mail**. Then open it. 4. In the **Mail** setup dialog box, click **Data Files**. 5. You can find all MS Outlook data files and their paths. We also recommend you to check the following default locations for PST files: *C:\\Users\\%username%\\AppData\\Local\\Microsoft\\Outlook\\* *C:\\Users\\%username%\\Documents\\Outlook Files\\* For Windows XP and older versions, you can check the following locations: *C:\\Documents and Settings\\%username%\\Local Settings\\Application Data\\Microsoft\\Outlook\\* *C:\\Documents and Settings\\%username%\\My Documents\\Outlook Files\\* ### How to repair Outlook data files with your tool? Please do as follows: 1. Download our recovery software by clicking the “Free Download” button in [the product page](https://www.datanumen.com/outlook-repair/). 2. Double-click the installer to install our tool. 3. The installer will start our tool automatically. 4. Our tool has an extremely simple user interface. So for most of the cases, you can use it to restore your data without any difficulties. You can also find a detailed guide on how to repair Outlook data files with our software by visiting the [DataNumen Outlook Repair homepage](https://www.datanumen.com/outlook-repair/), then clicking the “How to Recover” tab. There is a step-by-step guide and a video tutorial. ### Do you support Outlook for Android? Yes, we do. You can do as follows to repair corrupt PST files created by Outlook for Android: 1. Connect your smartphone to a PC computer. 2. Copy the corrupt PST file from smartphone to PC. 3. Repair PST file and recover file data with our tool. 4. Copy the fixed PST file back to the smartphone. ### Can other email clients open the fixed PST file? Yes, all email clients compatible with PST format can open the fixed PST file generated by our Outlook repair tool. For example, you can import the PST file to your Exchange server. Note our PST recovery tool can output PST files in two formats, i.e., Outlook 97 – 2002 and Outlook 2003 – 2021/Office 365. You need to set the file format based on the version of Outlook that will be used to open the file. If you will use the Outlook on your local computer to open the PST file, then our tool will set the output format automatically. ### Can you export the fixed file in .DBX format? .DBX file format is used by Outlook Express, which has been retried for 16 years. So, our tool does not support to output data in .DBX format. ### Can you export the fixed file in .MBOX format? .MBOX format is a Unix file format to store a collection of email messages. We do not support to output file in .MBOX format directly, but you can use Mozilla Thunderbird to convert the fixed PST file to .mbox format. ### Can you export recovered items to .msg files? Our Outlook recovery software does not support such a feature. But you can do that manually, as follows: 1. Open the fixed PST file in Outlook. 2. Export your Outlook email to a .msg file. We recommend you to use Unicode format so that all the encodings will be kept properly. ### Can you export recovered items to .eml files? Our Outlook PST repair software does not support to do so automatically. But you can do that manually, as below: 1. Open the fixed PST file in Outlook. 2. Export your email message to a .msg file 3. Download [MFCMAPI](https://github.com/stephenegriffin/mfcmapi) based on your Outlook bitness. 4. Start MFCMAPI. 5. Click **Advanced -> Import/Export -> Convert MSG to EML** to convert the .msg file to .eml file format. 6. Repeat the above steps for all emails you want to convert. ### How to import .eml files back to Outlook? You can do as follows: 1. [Import .eml files to Outlook Express](https://www.datanumen.com/outlook-express-repair-import/). 2. Import the Outlook Express emails to Outlook. ### How to convert .eml files to other formats? You can do as follows: 1. Import .eml files to Outlook. 2. Export the emails as .msg, .html, .rtf, and other formats. ### What is the difference between the demo version and the full version? Both versions use the same PST recovery engine. But the demo version will replace the message body with a demo text. To obtain the actual recovered contents, you need to use the full version to re-repair the corrupt PST file. ### Do you support to repair large PST files? Yes, our Outlook recovery tool can repair PST files as large as 16777216 TB. And our Outlook data recovery tool can split the large file into small parts. Note different versions of Outlook have different size limitations on the PST file, please refer to [this article](https://www.datanumen.com/outlook-repair/errors/corrupt-pst/) for solutions. ### Can your Outlook PST repair software recover deleted items in Outlook? Yes, other than fixing PST file corruptions, our PST file repair tool can also recover deleted items, including folders, Outlook emails and other mailbox items. ### Will you remove duplicate emails in the output PST file? Yes, our file recovery tool will try to remove duplicate email messages during the PST data recovery process. But sometimes, you may still find some duplicate emails in the Recovered\_Groupxxx folders. This is normal. ### Do I need to back up the source PST file before PST recovery? No. Our PST recovery tool will NOT change the source corrupt PST file. It will create a new PST file containing the recovered data. ### Can you recover Outlook emails and other items from an encrypted PST file? Yes, even if you forget the password, we can still recover data from the encrypted PST file. ### How to restore a deleted Outlook account? The procedure depends on the type of your Outlook account: 1. For Outlook accounts using PST files, you need to do as follows: 1. Recreate the account. 2. Associate the PST file with the account. 2. For Outlook accounts using OST files, you need to do as follows: 1. Recreate the account. 2. Re-synchronize your account to recreate the OST file. ### Can I recover emails on Outlook.com? Yes, if you have received Outlook.com emails to a PST file on your local computer, then you can recover emails, including deleted emails from the PST file via our tool. However, for those emails that have not received to the local PST file, then you need to login Outlook.com and check if there is an online email recovery function available. ### I cannot find my email in the fixed PST file. Why? By default, all the emails will be restored back to their original folders. If you cannot find a wanted email in its original folder, you can use the search function in Outlook to look for the email with its subject, sender, or other criteria. Sometimes our tool may put the email in another folder, or the Recovered\_Group### folder. ### Should I open or import the fixed PST file? You should always open the fixed PST file, instead of importing it. Outlook as an “Import and Export Wizard”, which can import emails in PST file. However, the import process will overwrite existing emails with the same subjects. So it is dangerous. Especially when you are trying to import emails from a fixed PST file generated by the demo version, since the subjects of these emails are demo texts, not the really recovered contents. ### Can you recover Outlook password? There are two kinds of Outlook passwords: 1. Password for Outlook email account. You need to contact the email service provider to find the way to recover your password, such as using a recovery phone number. 2. Password for Outlook PST file. If you forget the password, you can use our tool to [unencrypt the file without the password](https://www.datanumen.com/outlook-repair/errors/outlook-password/). 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requests", "Recover contacts, distribution lists, tasks, task requests, journals, and notes", "Recover deleted email messages and other Outlook objects", "Recover emails in plain text, RTF, and HTML format", "Recover attachments, including documents and images attached to messages and embedded in HTML bodies", "Recover embedded objects, such as another email, Excel worksheets, and Word documents", "Recover password-protected Outlook data files", "Recover oversized Outlook data files", "Split output files into smaller files", "Convert Outlook data file formats", "Generate fixed PST files in Outlook 97-2002 format and Outlook 2003-2019 and Outlook 365 format", "Fix the \"Can't move the items\" error in Outlook PST files", "Fix the problem that Outlook PST or OST files are slow or unresponsive", "Provide comprehensive switches to control the scan, recovery, and output process", "Recover Outlook data from healthy or damaged disk files, image files, and backup files", "Recover Outlook data from temporary files created by Outlook when a data disaster occurs", "Support 95 languages" ], "aggregateRating": { "@type": "AggregateRating", "ratingValue": "4.9", "bestRating": "5", "worstRating": "1", "ratingCount": "1632" }, "offers": { "@type": "Offer", "name": "1 User License", "url": "https://www.datanumen.com/outlook-repair/buy/", "priceCurrency": "USD", "price": "199.95", "availability": "https://schema.org/InStock" } } ```