EdbMails EDB Recovery and Migration software
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    Exchange EDB / Email Recovery Tools
    • EDB Recovery and MigrationRecover EDB to PST, EDB to Office 365 and Exchange NO Duplicate Migration
    • OST Recovery and MigrationRecover OST to PST, OST to Office 365 and Exchange Migration
    • PST Recovery and MigrationRecover Outlook PST, PST to Office 365 and Exchange Migration
    • MBOX Export and MigrationExport MBOX to PST, MBOX to Office 365 and Exchange Migration
    • NSF Export and MigrationExport NSF to PST, NSF to Office 365 and Exchange Migration
    • EML to PST ExportEML files export to Outlook PST format
    • PST to MSG ExportOutlook PST files export to MSG format
    • MSG to PST ExportExport MSG files Outlook PST files
    Exchange and Office 365 Migration
    • Exchange Server MigrationMigrate Exchange 2007, 2010, 2013, 2016, 2019 to Office 365 tenants. Also, migrate between Exchange servers and PST
    • Office 365 MigrationMigrate Source Office 365 tenants to Destination Office 365 tenants. Also, migrate to Exchange Server and PST
    • IMAP Email Backup & MigrationMigrate all IMAP email servers (Gmail, Zimbra, Zoho, Yahoo etc.), Office 365, Exchange and Backup to Outlook PST
    • SharePoint Online MigrationMigrate documents, files and folders from SharePoint sites
    • OneDrive for Business MigrationMigrate documents, files and folders from OneDrive
    • Microsoft Teams MigrationMigrate Teams, documents, files and folders etc.
    Exchange and Office 365 Backup
    • Office 365 BackupIncremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup
    • Exchange Server BackupIncremental, Granular, Encrypted and Compressed Exchange Mailboxes Backup
    • SharePoint, OneDrive & Teams BackupBackup Online site collections, Team sites, Office 365 groups, all documents etc.
    • Duplicate Remover - Office 365 & Exchange Remove duplicate emails, calendars, contacts, journal etc. from Office 365 and Exchange
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User’s Manual
OST Recovery and Migration

User Manual

User Manual

  • Overview
  • System Requirements
  • Installation
    • Installation process
    • Reinstall or Upgrade
    • How to uninstall
  • Initial Setup
  • FAQ
    • OST to PST
    • OST to Office 365 Migration
    • OST to Exchange Migration
  • Videos
    • OST to PST Converter
    • OST to Office 365 Migration
    • OST to Exchange Migration
  • Screenshots
    • OST to PST
    • OST to Office 365 Migration
    • OST to Exchange Migration
  • How it works?
    • OST to PST Converter
    • OST to Office 365 Migration
    • OST to Exchange Migration
  • Connect to Exchange server for multiple mailboxes migration
    • Connect with Global Admin
    • Connect to multiple users using CSV file
    • Connect using full access permission
    • Connect individual users for Single / Specific user Migration
  • Connect to Hosted Exchange for its Migration
    • Connect with Full Access permissions
    • Using multiple user credentials with CSV file
    • Connecting to Individual user for its migration
  • Connect to target Office 365
  • Modern Authentication Using OAuth 2.0
    • Microsoft 365 modern authentication
    • Automatic Registration
    • Manual Registration
  • Set Exchange Server Impersonation rights
    • Exchange 2007 and below
    • Exchange 2010, 2013, 2016 and 2019
    • Set using Exchange Server GUI
  • Knowledge Base
    • Corrupt OST file recovery
    • Unicode and ANSI OST format
    • Split OST file
    • Rebuild OST file
    • Exchange mailbox backup
    • Recover orphaned OST file
    • Recover all Exchange and Outlook OST files
    • Recover metadata and attachments
    • Export unlimited OST files to PST
    • Free OST file viewer
    • Granular recovery of OST file
    • Recover encrypted OST file
    • Recover deleted mailboxes from OST
    • Export email, calendars, contacts
    • Selective OST export
    • Migrate OST to Office 365
    • OST to Live Exchange
    • Outlook OST cannot be accessed
    • Log report
    • Fix Outlook not connecting to server error
    • Fix Outlook the set of folders cannot be opened
    • Fix Outlook not syncing error
    • Outlook Cached Exchange mode
    • Fix Outlook data file cannot be accessed
    • Fix the error Outlook inbox not updating
    • Your mailbox has been temporarily moved on Exchange server
    • Open OST file in Outlook
    • Repair corrupted OST files from Outlook 365
    • Save Outlook emails to hard drive
    • Import OST file into Outlook
    • Your Outlook data file cannot be configured
    • Errors have been detected in the OST
  • Incremental Migration
  • Exchange Throttling Policy
  • Map the Mailboxes
  • Multifactor Authentication
    • Enable MFA in Office 365
    • Create App password for MFA
    • Disable Security Defaults
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  3. EdbMails OST to PST Converter: Fast, Secure OST Repair and Conversion
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Recover Outlook emails with EdbMails converter for OST

Outlook data can become inaccessible for several reasons—server crashes, accidental mailbox deletion, oversized OST files, or synchronization issues. In such situations, the OST file, which stores your offline mailbox data, becomes unusable, especially if it's orphaned or corrupted. This can disrupt communication and leave important emails and attachments out of reach.

EdbMails OST to PST Converter offers a dependable way to restore access to your Outlook data. It enables you to convert OST files to PST format quickly, while preserving the original folder structure and recovering everything from emails to contacts and calendars. Whether the file is slightly damaged or severely corrupted, EdbMails handles the conversion with accuracy. It also supports exporting to other formats like EML, HTML, and MHT, or directly migrating data to Office 365 and Exchange.

Move Exchange mailbox to another database

This step-by-step guide will walk you through using EdbMails—from selecting the OST file to converting and exporting your data. It’s a straightforward process designed to help you recover what matters without complications or downtime.

Common reasons for OST file corruption

OST files may get corrupted due to various reasons and this can lead to data loss if it is not fixed immediately. The following points are the most common reasons for OST file corruption.

  • In cases like ransomware attacks, server crashes, or accidental mailbox deletions, the Exchange server may become permanently inaccessible, leaving the Offline Storage Table (.ost) file orphaned and unusable.
  • Various issues can prevent you from accessing the OST file in Outlook, such as registry or installation issues, leading to errors like 'Your Outlook data file could not be configured' or Outlook (cached mode) OST file not updating folders from the Exchange server, OST file synchronization errors, inconsistent Exchange database, and process terminations due to database corruptions.
  • An oversized OST file can slow down Outlook’s performance and may require exporting emails to a PST file on your hard drive as a PST backup
  • Network interruptions during OST file synchronization, abnormal Outlook shutdown, and Outlook termination can damage and corrupt OST files, which can be recovered and converted to PST using EdbMails OST converter software.
  • Accidentally deleted or emails in Exchange server can be backed up to PST by exporting local OST files using EdbMails tool.

EdbMails enables you to convert OST files to PST format for convenient and safe recovery/backup in all the above scenarios.

Why Choose EdbMails OST to PST Converter?

  • EdbMails is the best choice for converting OST files to PST format, offering a wide range of features that ensure a smooth and efficient process.
  • It provides high-speed conversion, a user-friendly interface, and ensures 100% data security, allowing you to convert OST files to PST quickly without data loss.
  • In contrast, SCANPST (the built-in Outlook data repair tool) often fails, showing errors such as ‘Inbox repair tool does not recognize the file.ost’ or ‘scanpst fails to repair ost file’.
  • SCANPST can only handle minor OST file corruption and struggles to recover mail items when the mailbox has been temporarily moved on the Exchange server.
  • To repair OST files in Outlook 2021, 2019, 2016, 2013, 2010, and 2007, EdbMails is a much more reliable option.
  • EdbMails can recover and convert even severely corrupted OST files, making it a complete solution for any OST file repair or conversion needs.

How to repair the corrupt and damaged OST files?

Microsoft Outlook cannot access corrupted OST files. If you try to access mail items from such corrupted files, various error messages may appear such as,‘Outlook OST file cannot be opened’,‘Errors have been detected in the OST file’ and so on. EdbMails is one of the best options for repairing and converting corrupt and damaged OST files to PST. It can fully repair Outlook OST files and enable you to recover and convert all your email data.

How to repair the OST file and convert it to PST file?

Here are the steps to convert OST files to PST format

  • Step 1: Download and install EdbMails OST to PST converter tool
  • Step 2: Browse the corrupt OST file to repair and convert
  • Step 3: Select the mailbox and folders you want to export
  • Step 4: Choose the PST file location to save the recovered data
  • Step 5: Apply Advanced Filter Settings - Date, CC, To, (optional)
  • Step 6: Start converting the Outlook OST file to PST.
  • OST to PST converter video

Features of EdbMails OST to PST Converter

  1. Easy-to-use Interface: EdbMails OST to PST Converter has a simple and user-friendly interface that makes it easy for anyone to convert OST files to PST format.
  2. High Speed Conversion: EdbMails lets you convert large OST files to PST format in minutes, and to manage oversized files effectively, it also provides an option to split OST files into multiple PST files during the conversion.
  3. 100% Safe and Secure: EdbMails OST to PST Converter is a safe and secure tool that ensures that all your data is protected during the Outlook data conversion process.
  4. Preview Option: EdbMails allows you to open the OST file and preview the mailbox items including emails, contacts, calendars, notes, tasks, journals, and header information before converting it to PST format.
  5. No Data Loss Conversion: EdbMails ensures that all your Outlook data is converted to PST format without any loss.
  6. Outlook Compatibility: EdbMails supports all versions of Outlook, including the latest version of Outlook 2022.

Frequently Asked Questions (FAQ)

  1. What is an OST file and how does it differ from PST files?

    An OST (Offline Storage Table) file is a local copy of your Exchange mailbox that allows you to access and work on your emails even when you're offline. Once you're connected to the Exchange server again, any changes made while offline are automatically synchronized. OST files are automatically created when your Exchange mailbox is configured in Cached Exchange Mode in Microsoft Outlook, ensuring continuous access to your mailbox data.

    A PST (Personal Storage Table) file, on the other hand, is a file format used to store copies of emails, contacts, calendars, and other data in Microsoft Outlook. Unlike OST files, PST files are not synchronized with an Exchange server and are typically used for archiving or backup purposes.

    The key difference between OST and PST files is their function. OST files provide offline access to Exchange mailboxes and are created in Cached Exchange Mode, allowing users to work with their mailbox data without a direct server connection. PST files, however, are used for locally storing Outlook data, whether for archiving, backup, or keeping data that isn't linked to an Exchange server mailbox.

  2. Does EdbMails fix OST file corruption?

    Using EdbMails OST to PST Converter is an effective solution for repairing corrupted OST files. The tool helps you fix corruption issues and recover all your email data seamlessly. In addition to converting OST files to PST, EdbMails also allows you to export emails to other formats like EML, HTML, and MHT. Plus, it offers the convenience of directly uploading OST data to Office 365 or a Live Exchange server.

  3. How does EdbMails compare to ScanPST?

    Compared to ScanPST, EdbMails offers more advanced features, better data recovery options, a user-friendly interface, and can recover and convert corrupted and orphaned OST files to PST format. ScanPST may not be able to recover data from severely corrupted PST files.

  4. How long does it take EdbMails to convert an OST to a PST file?

    EdbMails uses advanced algorithms to convert OST files to PST format quickly. The conversion time varies depending on the size of the OST file, but it typically takes only a few minutes.

  5. Can I convert OST to PST for free with EdbMails?

    Yes, EdbMails includes a free trial version with which you can convert 30 mail items from each folder of the OST file to PST format. The free tool also enables you to repair, open and view the contents of the OST file before you start the conversion operation.

  6. How does EdbMails protect the data during the conversion process?

    EdbMails algorithms ensure that all data is protected during the conversion process. The software does not alter the original OST file and saves all data to a new PST file. The output file is an exact copy of the source file, including all email properties and data formatting.

  7. Can EdbMails convert password-protected OST files to PST format?

    Yes, EdbMails can convert encrypted and password-protected OST files to PST format without requiring you to provide any password during the conversion.

  8. What is the largest OST file EdbMails can convert to PST?

    EdbMails has no size limit when converting OST files to PST, allowing you to handle even the largest OST files without any issues. Additionally, the software offers a file-splitting option during conversion, enabling you to divide the output PST file into smaller, more manageable parts for easier handling.


Additional resources:

  • OST to PST Converter
  • Unicode and ANSI OST format
  • Split OST file
  • Rebuild OST file
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 In this manual

IntroductionReasons for CorruptionEfficient ConversionOST file RepairFeatures od EdbMailsFAQs

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