Compatibility: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
For most types of accounts, such as IMAP, Microsoft 365, Exchange, and Outlook.com, an Offline Outlook Data File (.ost) is used to store a synchronized copy of your mailbox information on your local computer. In some situations, such as network outages or data corruption, you may need to recover emails from an OST file. In this article, we will discuss some methods to recover emails from an OST file.
Note: In Outlook 2013 and earlier versions, IMAP accounts used an Outlook Data File (.pst).
In earlier versions of Outlook, Microsoft previously recommended using the Scanost.exe tool for errors that occur with your offline Outlook Data File (.ost). The Scanost.exe tool is no longer available starting in Outlook 2010. Microsoft now recommends deleting your offline Outlook Data File (.ost) and letting Outlook redownload the information from the server. You might want to rebuild the .ost file in the following situations:
The reason for these errors and other problems in synchronization might be corruption in the .ost file, and in some cases, emails may not be synchronized from the server. When all you have is an ost-file and you can't access your email account via Outlook at the moment anymore either, an alternative to rebuilding the .ost file is to extract the data.
Information: After deleting the .ost file, any items that are saved locally will be lost, such as Calendar, Contacts, Tasks, and any folders marked Local only. In this situation, we recommend backing up your existing .ost file.
If you encounter Outlook connection issues or cannot rebuild your .ost file, there are several tools available that can help you recover data from an OST file. These tools can extract emails from .ost files without requiring Microsoft Outlook or a server account connection. They can help you recover important emails, contacts, tasks, and other data from your OST file and save it in various file formats for future use.
OST PST Viewer can open orphaned, corrupted, encrypted, and password-protected OST files. With this tool, you can export emails from an OST file to various file formats, including MSG, EML, and PST. Follow these steps to export emails from an OST file.
There is no limit on the number and size of the recovered OST files. You can convert unlimited folders or files as often as you like.
The program can bulk recover emails from an OST file in batch scripts using PowerShell, Task Scheduler, and other automation tools. To do this, use the command-line options of the product.
Note: Command line parameters are not available in the Home license.
pstwalker-cli.exe [filename] [-E:<FileFormatParameter>] [-Name:<NamingStyleParameter>] [-SearchQuery:<String>] [-ExportPath:<DestinationPathParameter>] [-FullScan] [-HardDeleted | -HardDeletedOnly] [-Log]
Updated on May 04, 2023
This guide provides step-by-step instructions on how to use PST Walker. Learn how to navigate the interface, open and search for emails, extract attachments, and more.
OST to PST Converter is a powerful tool that can convert multiple OST files to PST files. The tool can extract emails from .ost files without requiring Microsoft Outlook or a server account connection. This makes it a useful application in case of data loss, corruption, or inaccessibility of .ost files.
Learn how to troubleshoot missing data or emails in Outlook for Microsoft 365, and the steps to recover them if possible. Recover deleted messages in a user's mailbox in Exchange Online.