Microsoft Outlook Repair Tool

How to Repair Outlook File

Recovery Toolbox for Outlook helps to repair damaged Microsoft Outlook PST files

Updated: 2026-10-17

Victor Bobrov Written by:

How to Repair an Outlook PST File

If Outlook does not open the PST file, use Recovery Toolbox for Outlook or an online PST file repair service. The tool or online service can repair emails, appointments, attachments, contacts, tasks, notes, calendars, journals, and other items from corrupt PST or OST Microsoft Outlook files. Both the desktop tool and the online service allow you to scan corrupted Outlook files of any size or version to preview recoverable data for free. Error 0x80040116 can be fixed in a few steps described below.

Step-by-step instructions for repairing the data from corrupted Outlook Personal Storage Table (PST) files. These instructions apply to all sizes and versions of Microsoft Outlook data files:

  1. Download Recovery Toolbox for Outlook from: https://outlook.recoverytoolbox.com/download/RecoveryToolboxForOutlookInstall.exe
  2. Install the software on your Windows operating system.
  3. Launch the application on your PC.
  4. Select the damaged PST or OST file on the home screen.
  5. Select Recovery mode
  6. View the content of the PST file
  7. Select a folder for saving recovered data
  8. Select Save as PST file
  9. Click Save

To achieve the highest possible recovery accuracy, Recovery Toolbox for Outlook performs an in-depth examination of the PST file's internal architecture. The software analyzes essential PST components, including the file header, B-trees, allocation nodes, block structures, and MAPI property tables. During this process, it validates data-block integrity, identifies duplicate records, and excludes obsolete copies.

Verified blocks are reconstructed into logical nodes so the recovery engine can work with the latest valid revision of each item. The program then rebuilds Outlook objects such as email messages, attachments, subject fields, calendar entries, contacts, and folders and checks their consistency before export. Older or redundant versions of recovered objects are removed automatically.

At every recovery stage, the application decrypts protected data and applies decompression when required. This approach enables Recovery Toolbox for Outlook to extract usable information even from PST files that are partially encrypted, structurally damaged, compressed, or contain mixed data formats.

How to fix Outlook

The software scans your local Outlook data files to analyze their integrity. Consider using the application if you encounter the following issues:

  • You receive a message that Outlook can't open your data file
  • You receive a message that Outlook can't open the set of folders
  • You think your Outlook data file may be damaged

If you don't have a Windows computer with the desktop version of Outlook installed, then you can repair a corrupt PST file by using a special online service here.

Free Methods to Troubleshoot Outlook Errors

How to resolve error 0x80040116 in Outlook for free.

Use these manuals if your Outlook mail profile is corrupted or if your PST data file with emails, contacts, appointments, files and other important information cannot be opened with Microsoft Outlook. Deep file repair can be time-consuming, so we recommend trying standard troubleshooting steps before utilizing dedicated recovery software:

  • Rebooting the computer.
  • Reinstalling Microsoft Office suite (including Outlook).
  • Installing the latest Windows updates.
  • Checking the mail profile with special Outlook tools (Microsoft Inbox Repair tool such as ScanPST.exe and so on).
  • Restoring Outlook data from the latest backup, if you have one.
how to recover pst file ms outlook
ms inbox repair tool

If all the above steps failed, then use the Outlook Inbox repair tool to repair the PST file and replace the corrupted PST file in the Mail profile of Windows. It is mandatory to try all the free steps before using the Recovery Toolbox for Outlook.

The Recovery Toolbox for Outlook technical support team can be a last resort in difficult cases. The development team can individually analyze the corrupt file and recover the maximum amount of data from the corrupt Outlook file. Technical support for the first year is included in the program price. This personalized approach has improved the quality of data recovery with the program and online service; personalized solutions are entered into the program and become available to everyone.

By clicking Download or Repair Online, you agree to the Terms of Service and EULA.

Recovery Toolbox for Outlook

Microsoft Outlook PST repair tool

Microsoft Outlook PST Repair Tool

The Recovery Toolbox for Outlook solves problems with corrupted Outlook storage files.

The Microsoft Outlook Inbox Repair Tool includes an online version, found here. The Outlook Online Repair Service allows you to repair corrupted PST/OST files on any device (desktop, tablet, phone) with any OS (Windows, Android, macOS, iOS and so on). The PST Online Repair Service does not require Microsoft Outlook to be installed and does not need to have any third-party software installed on your device.

Features of the Outlook File Repair Tool

Recovery Toolbox for Outlook is designed to repair and recover data from damaged Microsoft Outlook PST files. It supports legacy ANSI PST files created by Outlook 97 through Outlook XP, as well as modern Unicode PST files used by Microsoft Outlook 2003 and later versions. The software can also recover PST files created by Outlook for Microsoft 365, making it suitable for both older archives and current Outlook mailbox data.

The tool can process corrupted, password-protected, and encrypted Outlook PST files. It analyzes the internal mailbox structure and attempts to restore accessible data even when Outlook cannot open the file normally or when the original PST database contains damaged records, broken folder references, or unreadable items.

Recovery Toolbox for Outlook can recover email messages, contacts, appointments, calendar entries, tasks, notes, journal records, attachments, and other Outlook objects stored in a damaged Personal Store Folder. It also restores items that contain embedded objects or attached files, such as documents, images, attached email messages, contact cards, and other mailbox content.

Recovered information can be saved in several commonly used output formats, depending on the required workflow. The software can create a new PST file for importing into Microsoft Outlook, or export individual items as MSG, EML, VCF, or TXT files. For example, PST to EML conversion can be useful when messages need to be opened in another mail client, archived independently, or processed by email migration software.

The application can also work with large Outlook data files that exceed 2 GB. This can be important for older ANSI PST databases, which may become unstable or inaccessible after reaching the historical size limit. Such problems may be associated with Outlook errors including 0x80040119, file-access failures, mailbox corruption, or an inability to open folders correctly.

Recovery Toolbox for Outlook includes an OST Viewer mode that allows users to inspect the contents of Offline Outlook Data Files (.ost). It can also convert OST data to PST format, helping users preserve locally cached Exchange Server or Microsoft 365 mailbox data when the original Outlook profile, Exchange Server connection, or account access is no longer available.

The program can be used as an Outlook email recovery tool when a PST file cannot be opened, when mailbox folders are missing, or when messages and attachments are inaccessible through Microsoft Outlook. It can also help address common Outlook data-file problems, including the 0x8004010F error, which is typically displayed as Outlook data file cannot be accessed.

Recovery Toolbox for Outlook supports PST repair scenarios involving Outlook 2016, Outlook 2019, Outlook 2021, Outlook 2024, and Outlook for Microsoft 365. It can provide an alternative recovery method when Microsoft Inbox Repair Tool (ScanPST.exe) cannot repair a file, produces an incomplete result, or hangs during the repair process. In these cases, the software can scan the original damaged PST file and extract recoverable mailbox data into a new usable file structure.

features of PST viewer
ms outlook pst repair tool

How to repair Outlook

The MS Outlook repair software fixes many Personal Store Folder errors:

  • Unable to open your default e-mail folders.
  • Errors have been detected in the file Outlook.pst. Close all mail enabled applications, and then use the Inbox Repair Tool.
  • Outlook.pst cannot be accessed - 0x80040116.
  • XXXXXXX.pst file could not be opened. The file may not be compatible with this version of Outlook or it may be corrupted.
  • OL2000: Unable to use your personal folder file if it exceeds the 2 GB size limit.
  • Unable to display the personal Outlook folder.

If Microsoft Outlook cannot open your Personal Store Table (*PST file), download, install and launch the Recovery Toolbox for Outlook. The MS Outlook PST repair tool will read and show the contents of the corrupted PST file. You can use Recovery Toolbox for Outlook in DEMO mode as a PST viewer. Our program doesn't use MS Outlook to repair Outlook data files.

Recovery Toolbox for Outlook can repair Outlook files of all versions. How to repair a PST file in Outlook in few clicks. Recovery Toolbox for Outlook can also fix 2GB error PST files. Later, you can divide a resulting file into several PST files, each being of a predetermined size.

Requirements:

  • Windows 98/Me/2000/XP/Vista/7/8/10/11 or Windows Server 2003/2008/2012/2016/2019/2021/2024 and above, Outlook for Microsoft 365
  • Microsoft Outlook 98, Microsoft Outlook 2000, Microsoft Outlook 2002, Microsoft Outlook 2003, Microsoft Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019, Microsoft Outlook 2021, Microsoft Outlook 2024, Outlook for Microsoft 365 must be installed on the user's computer at the time of conversion (excluding Outlook for Office 365, Outlook for iOS and Outlook for MacOS).
Notes and Limitations:
  • This software does not export contact groups.
  • Microsoft Outlook Inbox repair tool does not have a limit on the size of the file to be repaired.
  • Microsoft Outlook Inbox repair tool does not have a limit on the quantity of files to be repaired.
  • The online repair service works for customers of Macs, phones, iOS, Android and other non-Windows devices.
  • The desktop version of Outlook must be installed on a PC to save the repaired data into PST file(s).
  • Recovery Toolbox for Outlook can use any version of PST/OST files.
  • Recovery Toolbox for Outlook does not have a restriction on the size of PST/OST files.
  • Recovery Toolbox for Outlook does not have a restriction on the quantity of recovered or converted files.
By clicking Download or Repair Online, you agree to the Terms of Service and EULA.

Recovery Toolbox for Outlook

fix tool outlook errors
Sources of Outlook PST File Errors

Microsoft Outlook errors related to a Personal Storage Table (.pst) file can occur for many different reasons. In some cases, the Outlook mail profile itself becomes corrupted; in others, the PST file, local Windows environment, storage device, or synchronization process is affected. As a result, Outlook may be unable to open a mailbox, display folders, send or receive messages, or access email items stored in the data file.

A PST file can become damaged after an incorrect startup from sleep or hibernation mode. For example, if the computer does not resume correctly and Outlook is already running, the application may lose access to open mailbox data or fail to finish writing changes to the PST file. Improper shutdowns can create similar problems, especially when Windows is restarted, powered off, or forced to close while Outlook is saving messages, updating folders, or synchronizing account data.

Power failures can also interrupt write operations and leave the Outlook data file in an inconsistent state. This may happen during mailbox synchronization, indexing, archiving, or message delivery. Windows malfunctions, unexpected application crashes, and file-system errors can have the same effect because Outlook depends on the operating system and storage subsystem to maintain the internal structure of the PST file correctly.

In some situations, Outlook data may be affected by incorrect encryption or an interrupted operation involving a protected PST file. Password-protected or encrypted Outlook data files can become inaccessible if the encryption process does not complete correctly, if the file is copied while still in use, or if its internal database structure is already damaged.

Virus infections and other malicious software can damage Outlook files directly or interfere with Windows services, storage access, and email-related components. Antivirus programs can also cause problems in certain cases. For example, real-time scanning may lock a PST file while Outlook is using it, interrupt an operation, quarantine a related file, or interfere with mailbox synchronization.

Hardware problems are another common cause of Outlook data-file errors. A failing hard drive, SSD, USB storage device, or network disk may return read or write errors while Outlook is accessing the PST file. Disk-sector damage, unstable connections, insufficient free space, and file-system corruption can prevent Outlook from opening the file or may cause messages, folders, and attachments to become unreadable.

Synchronization issues can also affect Outlook mailbox data. A poor internet connection may interrupt communication with Microsoft Exchange Server, Microsoft 365, or another mail server while Outlook is downloading, uploading, or updating email items. Incorrect synchronization with the mail server can create conflicts between local and server-side data, while problems with OneDrive, Dropbox, Google Drive, or other cloud storage services can occur when a PST file is synchronized, moved, or modified by multiple processes at the same time.

Finally, problems may occur when Microsoft Inbox Repair Tool (ScanPST.exe) cannot repair a damaged PST file correctly. The utility may report errors, stop unexpectedly, generate an incomplete repaired file, or fail to restore the required mailbox items. In more severe cases, the Microsoft Inbox Repair Tool — `ScanPST.exe` — may hang during the analysis or repair process and never complete the operation.

Preventing problems

To prevent problems and errors caused by corrupted Outlook storage crashes, you need to:

  • back up your Microsoft Outlook data on a regular basis with help of Outlook backup tools
  • regularly back up Windows and all the data on the computer
microsoft inbox recovery tool

FAQ Wiki:

Question:

My email correspondence and contacts in Microsoft Outlook stopped opening because of disk damage. Microsoft's standard ScanPST utility could not repair the PST file with my emails. How can I get my emails and contacts back?

Answer:

If Microsoft's ScanPST does not repair the email and contact storage in the PST file, you can use Recovery Toolbox for Outlook to evaluate the possibility of recovery. Step-by-step process for recovering emails from a damaged email storage file using the free demo version of Recovery Toolbox for Outlook:

  1. Read, analyze, and display the recovered data directly on the preview page.
  2. Then you can save emails and contacts from the damaged PST file to a new PST file.
  3. Remove the old damaged PST file from the Microsoft Outlook profile.
  4. Add the new recovered PST file to the Microsoft Outlook profile.

After these simple 4 steps, you can continue working, even after poor ScanPST results that may have shocked you.

Question:

I started the PST file encryption procedure in Microsoft Outlook, but everything froze halfway through. After restarting, Microsoft Outlook stopped opening my PST file. Apparently, half of my PST file is encrypted and the other half is not encrypted. ScanPST froze while reading the file. What can I do with a PST file that is only partially encrypted?

Answer:

For complex cases like this, you need to use the Recovery Toolbox for Outlook utility. The Recovery Toolbox for Outlook utility has an advanced algorithm based on specialized artificial intelligence that thoroughly analyzes and decomposes the data in the PST file.

Recovery Toolbox for Outlook can save all data to a simple unencrypted PST file, even if some of the data was previously encrypted.

Question:

I started the PST file compacting process in Outlook for Microsoft 365. But the power went out during compacting. After the power incident, my PST file stopped opening. The ScanPST utility could not restore my file to a working state and froze during recovery. How can I return my data to the state it was in before compacting started?

Answer:

Recovery Toolbox for Outlook reads PST files even if part of the file is compacted and part of the file is not compacted. Recovery Toolbox for Outlook will read the file piece by piece and display all data on the preview page. Then you can save all data to an uncompressed PST file.

Question:

My PST file in Windows 11 keeps asking for a password when opening Outlook for Microsoft 365. I reset the password in Outlook, but Outlook asks for the password again. How can I reset the password so it is no longer requested?

Answer:

The most likely cause of this error is the beginning of hard drive failure. To fix this problem, you should:

  1. Copy the problematic PST file to another drive;
  2. Run Recovery Toolbox for Outlook and recover the PST file on the new drive;
  3. Replace the hard drive on your computer and transfer your data and Windows;
  4. Move the recovered PST file to the restored computer;
  5. Open the PST file in Outlook on the restored computer.

Question:

Ransomware encrypted all files on my computer. Is there any chance of recovering emails and contacts from my Outlook for Microsoft 365 PST file?

Answer:

Yes, there is a chance of recovery. The larger the PST file, the better the chances of recovering emails and contacts from the Outlook Personal Data Storage file. Run Recovery Toolbox for Outlook on a separate computer and select the PST file copied from the infected computer for repair. Recovery Toolbox for Outlook will spend a long time analyzing and assembling the data back into a new PST file. The larger the source PST file, the higher the chances of recovery after ransomware. The virus encrypts the beginning and end of the file and changes data blocks in the file. But the artificial intelligence in Recovery Toolbox for Outlook assembles the mosaic of data blocks into emails and contacts and saves everything to a new file. Unfortunately, some data will be completely or partially lost, and the folder structure and nesting may be damaged. The most likely loss will be user settings and data in the PST file, because they are usually stored at the end of the file, and ransomware encrypts that part first.

Question:

On my computer with McAfee + Outlook for Microsoft 365, I cannot read the PST file with my Inbox mail. McAfee blocks access to the file. How can I read my incoming emails?

Answer:

Most antivirus programs (McAfee, Windows Defender, and so on) block a file if they detect a virus in it. When you receive an email, possibly spam, with a virus or malicious content, and Outlook tries to save it to a PST file in the Inbox folder, McAfee or Windows Defender may block this file and wait for your action. To avoid this and continue receiving mail, you should:

  1. Add the folder with the PST file to the antivirus monitor exclusions list;
  2. Add the folder with Windows temporary files to the antivirus monitor exclusions list;
  3. Unblock access to the PST file in the antivirus program.

Yes, the email with the virus will be stored in the PST file, but you should not click attachments in such suspicious spam emails and should not click links in emails from unknown sources.

Question:

My computer with Windows 11 and Outlook 2022 stopped working reliably with my large 55 GB PST file. I tried to repair the file with ScanPST, but it was unsuccessful because ScanPST simply froze. How can I split a large PST file and restore its operability?

Answer:

Recovery Toolbox for Outlook reliably reads and recovers PST files of 100 GB and more. To recover and optimize large Outlook Personal Storage files, you need to:

  1. Run Recovery Toolbox for Outlook;
  2. Open the settings window in Tools | Options (Tools | Options);
  3. Select the Split to volumes option (Split to volumes);
  4. Specify the maximum size of the new PST files, for example 10 GB;
  5. Select the large PST file on the first page of Recovery Toolbox for Outlook;
  6. Specify a new folder for recovering the PST files;
  7. Save all new PST files to the specified folder;
  8. Open each saved PST file in Outlook (File | Open & Export | Open Outlook Data File).

Each new PST file now has a smaller size and does not cause difficulties in Outlook. Each new PST file is now fully standalone and does not require other PST files nearby. The files are not linked to each other.

Question:

After updating Windows 11, Microsoft Outlook stopped opening my PST file and says that the set of folders cannot be opened. ScanPST found errors, but the situation did not change after repair. How can I recover my mail?

Answer:

In this situation, it is better not to run repeated repairs on the same PST file in ScanPST. Follow these steps:

  1. First, create a copy of the damaged PST file in a separate folder or on another drive.
  2. Then open the copy in Recovery Toolbox for Outlook and start recovery mode.
  3. The program will analyze the file structure and show the found emails, contacts, calendar, and other items on the preview page.
  4. Then save the data to a new PST file.
  5. Connect the new PST file in Microsoft Outlook via File | Open & Export | Open Outlook Data File.

Question:

I stored my Outlook PST file on a network drive. After a network outage, Outlook started reporting that the data file is damaged. Can this PST file be recovered?

Answer:

Yes, but first you need to copy the PST file from the network drive to the local disk of the computer. It is not recommended to recover the file directly from a network folder, because repeated connection drops may damage the data again. After copying, run Recovery Toolbox for Outlook, select the local copy of the PST file, wait for the analysis to finish, and save the recovered data to a new PST file. It is better to store the new file on a local disk, not in a network folder.

Question:

An external USB drive disconnected while Microsoft Outlook was running. After that, the PST file on this drive stopped opening. What should I do?

Answer:

First, do not write any new data to this USB drive. Copy the damaged PST file to the computer's internal drive if it is still readable. If copying fails with errors, first check the drive using standard Windows tools or use another computer. After obtaining a copy of the file, open it in Recovery Toolbox for Outlook. The program will try to read available data blocks and assemble emails, contacts, attachments, and calendar items into a new PST file.

Question:

Outlook 2022 shows error 0x80040116 when opening a PST file. ScanPST starts but freezes around the middle of the check. How can I regain access to my emails?

Answer:

Error 0x80040116 usually indicates an access problem or damage to the Outlook data file. Close Microsoft Outlook and all programs that may be using the PST file. Then make a backup copy of the damaged file. After that, open the copy in Recovery Toolbox for Outlook, select Recovery Mode, and wait for the preview of the found data. If the emails are displayed in the folder tree, save them to a new PST file and connect it instead of the old damaged file.

Question:

My PST file is located in a OneDrive folder. During synchronization, Outlook froze, and after restarting, the PST file stopped opening. Can the file be recovered?

Answer:

Yes, but first you need to stop OneDrive synchronization for this folder or copy the PST file to a regular local folder outside OneDrive. Outlook does not handle simultaneous PST file use and cloud synchronization well. After copying, run Recovery Toolbox for Outlook, select the damaged PST file, and save the recovered data to a new file. It is better not to place the new working PST file back into a synchronized folder.

Question:

After recovery on Windows 10, the new PST file became much smaller than the source file. Does this mean that most of the emails were lost?

Answer:

Not necessarily. Source PST and OST files often contain old versions of emails, deleted items, service blocks, and junk data that are no longer displayed to the user in Outlook. A new PST file usually contains only useful recovered data. Therefore, the recovered file may be several times smaller than the source file. It is better to check the result not by file size, but by the number of folders, emails, contacts, and calendar items in the preview and in the new PST file. This can be done conveniently on the preview page in Recovery Toolbox for Outlook.

Question:

Microsoft Outlook 2019 says: The file is not a personal folders file. Can this file be recovered?

Answer:

Yes, if the file is actually a PST or OST file but its header or internal structure is damaged. Copy the file to a safe location and open the copy in Recovery Toolbox for Outlook. Even if Outlook does not recognize the file as a valid storage file, the program can read separate data blocks and find emails, contacts, calendar items, and attachments. After analysis, save the found items to a new PST file.

Question:

I accidentally deleted several important folders in Outlook 2022 and then continued using mail. Can deleted emails be recovered from the PST file?

Answer:

You can try the deleted data search mode in Outlook Forensic Toolbox. The fewer new emails received and sent after deletion, the higher the chance of recovery. When Outlook deletes an item, its data may still remain inside the PST file, but it can later be overwritten by new emails. Therefore, close Outlook, make a copy of the PST file, and run Outlook Forensic Toolbox. Found emails can be saved separately or to a new PST file.

Question:

Can a PST file be recovered if Microsoft Outlook is not installed on the computer at all?

Answer:

For some saving options, especially creating a new PST file, Microsoft Outlook may be required on the computer. If Outlook is not installed, you can use the online version of the service or try to save the recovered data to separate files such as MSG, EML, TXT. To fully create a new PST file, it is better to perform recovery on a Windows computer with Microsoft Outlook installed.

Question:

Outlook asks for the PST file password, but I do not remember it. Can I recover my emails from the PST file?

Answer:

You can try opening this PST file in Recovery Toolbox for Outlook, which does not ask for the password. The program supports working with password-protected PST files and can try to read the available data. After recovery, the data can be saved to a new PST file or to separate files.

Question:

After recovery, the calendar is present in the PST file, but Outlook does not show it in the regular calendar. How can I open the recovered meetings?

Answer:

Open the new PST file in Outlook and expand it in the left panel. Then go to the Calendar section and enable the display of the calendar from the recovered PST file. It may appear separately from the main calendar of the account. If the calendar is visible as a separate folder, you can view it alongside the main calendar or manually move the required meetings.

Question:

After recovery, the contacts are present, but they are not displayed in the Outlook address book. Why?

Answer:

Contacts may be recovered to a separate Contacts folder inside the new PST file, but Outlook does not always automatically connect this folder as an address book. Open the recovered PST file, find the Contacts folder, and check its contents. If contacts are displayed in the folder but are not visible when composing an email, check the contact folder properties and Outlook address book settings.

Question:

Can I recover only one folder, for example Inbox, instead of the entire PST file?

Answer:

Yes. After analyzing the PST/OST file, Recovery Toolbox for Outlook shows a tree of found folders and objects. On the preview page, you can select only the folders or items you need to save. For example, you can save only Inbox, Sent Items, Contacts, or Calendar. This is convenient if the damaged file is very large and you only need specific data.

Question:

Do I need to delete the old damaged PST file after recovery?

Answer:

You should not delete the old file immediately. First, save the recovered data to a new PST file, open it in Outlook, and check emails, contacts, calendar items, and attachments. Only after checking should you remove the old damaged PST file from the Outlook profile. It is better to keep the file itself for some time as a backup copy on a separate drive.

Question:

Can I save the recovered PST file under the same name as the damaged one?

Answer:

This is not recommended. Do not save the result over the original damaged file. It is better to create a separate folder and specify a new name, for example recovered_outlook.pst. This protects the source file from being overwritten. If the recovery result is incomplete, you will still have the original for another attempt.

Question:

Outlook says that the PST file is already in use by this profile. I cannot connect the recovered file. How can I fix this?

Answer:

Close Outlook and restart the computer. Then open Outlook and check the list of data files in Account Settings | Data Files. Remove old or missing PST file references from the profile if they are no longer needed. After that, add the new recovered PST file. If the old and new files have the same names, rename the recovered file so you do not confuse it with the damaged version.

Question:

After recovery, Outlook started opening, but email search does not find anything. Is this a PST file problem?

Answer:

Not always. After connecting a new PST file, Outlook and Windows Search need to re-index the emails in the file. This may take time, especially if there are many emails. Check whether the emails are visible manually in the folders. If the emails open but search temporarily does not work, wait until indexing finishes. You can also rebuild the Windows Search index through indexing settings.

Question:

Can emails be recovered from a PST file if the disk started clicking and the file copies with errors?

Answer:

First, you need to stop actively using that disk. If the disk is physically failing, each new read operation may make the situation worse. Try to carefully copy the PST file to another storage device. If the copy succeeds, recover the copy, not the original. If the file cannot be fully copied, you may first need to recover data from the disk, and only then analyze the PST file in Recovery Toolbox for Outlook.

Question:

Can a PST file be recovered after an SSD failure?

Answer:

Yes, if the file can be read or copied. First, copy the PST file to another physical drive. If copying completes successfully, open the copy in Recovery Toolbox for Outlook. If the file copies with errors, first resolve the SSD data recovery problem. Recovery Toolbox for Outlook works with the PST/OST file itself, so it needs an accessible file, even if it is logically damaged.

Question:

I have an old ANSI PST file from Outlook 2000 that is almost 2 GB in size. Outlook stopped opening it. What can I do?

Answer:

Old ANSI PST files had size limits and could become damaged when approaching 2 GB. Make a copy of the file and open it in Recovery Toolbox for Outlook. After analysis, save the data to a new PST file in a modern format if a newer Outlook version is installed on the computer (2007 and later). If an old version of Outlook is used, you can save the data to several smaller PST files.

Question:

I need to save each email as a separate MSG file. Is this option supported?

Answer:

Yes. Recovery Toolbox for Outlook can save recovered items not only to a new PST file, but also to separate files. The MSG format is convenient if you need to open individual emails in Microsoft Outlook, send them to another user, or save them as an archive by folders. After previewing, select the required emails and specify saving to MSG.

Question:

Can I recover only contacts from a damaged PST file?

Answer:

Yes. After analyzing the file, the program shows the found folders and object types. You can select only the Contacts folder and save contacts separately. Depending on the task, contacts can be saved to a new PST file or to VCF files. If you then need to import contacts into Outlook, open the new PST file or import the VCF files using standard Outlook tools.

Question:

Duplicates appeared after recovery. How can I fix this?

Answer:

Duplicates may appear if the source PST/OST file contained old versions of emails, copies in different folders, results of previous imports, or partially deleted objects. First, check whether these are truly identical emails and not different versions of an email thread. Then you can use built-in Outlook features to sort by subject, date, and sender, and delete extra copies manually.

Question:

I want to recover a corporate OST file, but I do not have access to the old Windows domain. Is this possible?

Answer:

Yes. If the OST file is available on disk, you can try to convert it to PST without connecting to the old domain or Exchange Server. Run Recovery Toolbox for Outlook, select the OST file, and use conversion mode. After saving the result, open the new PST file in Outlook. This will allow you to access emails, contacts, and calendar items that were saved in the local OST file.

Question:

Can data be recovered from an OST file if the mailbox in Microsoft 365 has already been deleted?

Answer:

You can try if the local OST file remains on the computer and can be physically read. Outlook cannot open such an OST file directly because the account is no longer available. But Recovery Toolbox for Outlook can analyze the OST file and save the available data to PST. The sooner you start recovery and the fewer changes made to the file, the better the chance of recovering more data.

Question:

The program has been reading the PST file for a long time and seems frozen. Can I interrupt the process?

Answer:

For large or severely damaged PST/OST files, analysis may take a long time. You should not interrupt the process only because it is taking longer than usual. Check disk activity and CPU usage. If the program continues reading the file, it is better to wait for analysis to finish. If the process is truly frozen, make a copy of the source file, restart the computer, and try recovery again, preferably on a faster drive.

Question:

Can I use the demo version of Recovery Toolbox for Outlook to understand whether buying a license makes sense?

Answer:

Yes. The demo version is useful for preliminary evaluation of the result. It lets you open a damaged PST/OST file, run analysis, and see which emails, contacts, calendar items, and other objects were found. If the data you need is visible on the preview page, you can decide whether to save the result in the full version. This reduces the risk of purchase before checking a specific file.

Victor G. Bobrov, Senior Software Engineer.

MCSD, MCDBA

Microsoft Outlook expert in storing and displaying data from PST and OST files, specialist in converting and recovering data from PST/OST files with over 20 years of experience. Victor G. Bobrov, data recovery expert at Recovery Toolbox, with 20+ years of experience in rebuilding corrupted database architectures and Microsoft Exchange/Outlook storage formats. Article updated by Victor G. Bobrov, Microsoft Certified Professional

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This page is maintained by Recovery Toolbox / File Master LLC and is connected to the author profile, company profile, legal pages and support resources so users and search engines can verify who is responsible for the PST Viewer content.

Expert author and reviewer
Victor G. Bobrov

Chief Software Engineer and File Recovery Expert

Victor Bobrov is listed as the author and reviewer of this Outlook Repair guide and is connected in structured data as the creator of the Recovery Toolbox for Outlook Repair Tool.

Safe handling of PST files
  • For confidential mail archives, use the offline desktop Outlook Repair Tool so files stay on your computer.
  • Before opening a damaged PST file, work with a copy and keep the original file unchanged.
  • The Online Outlook Repair Service is provided for convenience when installation is not possible.
  • Links to EULA, privacy policy and support are kept visible for transparency.

Editorial note: This page was updated and reviewed on . The visible author, company and policy links match the JSON-LD entities used in the page source.

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