EdbMails EDB Recovery and Migration software
  • Products
    EdbMails
    All-in-one Recovery and Migration Tool
    • EDB recovery and Migration
    • OST, PST, MBOX, NSF, EML, MSG
    • Office 365, Exchange Migration
    • SharePoint, OneDrive & Teams
    • G Suite Migration
    • IMAP Migration
    • Duplicate Remover
    • EdbMails Data Recovery
    • Backup Solutions
    All Products

    EDB Recovery and Migration

    EdbMails lets you recover corrupted, damaged, and offline Exchange EDB files, convert EDB mailboxes to PST format, and directly migrate mailbox data to Office 365 and live Exchange Server.

    EDB to PST
    Recover corrupted, damaged, offline EDB files and convert Exchange EDB mailboxes to PST file format
    Public Folder to Exchange
    Migrate public folders from an Exchange offline EDB file to live Exchange Server
    EDB to Live Exchange Migration
    Directly migrate offline Exchange database (EDB) files to live Exchange server
    Archive Mailbox to Office 365
    Migrate archive mailboxes from offline EDB files directly to Office 365
    EDB to Office 365 Migration
    Directly migrate offline Exchange database (EDB) files to Office 365
    Public Folder to Office 365
    Migrate public folders from an offline Exchange EDB file to Office 365

    OST, PST, MBOX, NSF, EML, MSG Export and Migration

    EdbMails lets you to recover OST and PST files, export OST, PST, MBOX, NSF, EML, and MSG files to PST files, and directly migrate OST, PST, MBOX, and NSF mailbox data to Office 365 and live Exchange Server.

    OST Recovery and Migration
    Recover offline OST files, convert OST to PST, and migrate OST to Office 365 and Exchange Server
    PST Recovery and Migration
    Recover Outlook PST files , Export PST to PST, migrate PST to Office 365 and Exchange Server
    MBOX Export and Migration
    Export MBOX to PST, migrate MBOX to Office 365 and Exchange Server
    NSF Export and Migration
    Export NSF to PST, migrate NSF to Office 365 and Exchange Server
    EML to PST Export
    Convert EML files to Outlook PST files
    PST to MSG Export
    Convert Outlook PST file to MSG file format
    MSG to PST Export
    Export MSG files to Outlook PST files

    Office 365, Exchange Migration

    EdbMails lets you securely migrate mailboxes across Microsoft 365, Exchange, Google Workspace (G Suite), and IMAP-supported servers such as Outlook, Gmail, Zimbra, Zoho Mail, and cPanel, ensuring zero downtime.

    Office 365 Migration
    Migrate between Office 365 tenants, Office 365 to Exchange, Office 365 to PST, PST files to Office 365.
    Exchange Migration
    Migrate between any Exchange Servers, Exchange to Office 365, Exchange to PST, PST files to Exchange.
    Tenant to Tenant Migration
    Migrate Mailboxes, Public Folders, Archive Mailboxes between Office 365 Tenants.
    Exchange to Office 365
    Migrate Mailboxes, Public Folders, Archive Mailboxes from live Exchange server to Office 365.
    Office 365 to IMAP
    Migrate Office 365 to IMAP, Office 365 to Gmail, Office 365 to Outlook, Office 365 to Zoho etc.
    Exchange to IMAP
    Migrate from live Exchange Server to IMAP servers such as Gmail, Outlook, and Zoho Mail.
    Public Folder to Office 365
    Migrate Public Folders between Office 365 tenants with complete folder hierarchy and mailbox data integrity.
    Exchange to PST
    Export live Exchange Server mailboxes, public folders, and archive mailboxes to Outlook PST files.

    SharePoint, OneDrive & Microsoft Teams Migration

    EdbMails lets you migrate SharePoint sites, OneDrive data, Microsoft Teams, teams, channels, chats, permissions, and documents between Microsoft 365 tenants while maintaining the existing folder structure and data integrity.

    SharePoint Online Migration
    Migrate documents, lists, files and folders from SharePoint sites.
    OneDrive for Business Migration
    Migrate documents, lists, files, folders, private chats from OneDrive.
    Microsoft Teams Migration
    Migrate Teams, chats, channels, documents, files and folders etc.

    Google Workspace / G Suite Migration

    EdbMails G Suite Migration Tool lets you easily migrate emails, calendars, contacts, tasks, and more from G Suite to Office 365, Exchange Server, and IMAP servers using a Google Admin account without requiring individual user credentials.

    G Suite Migration
    Migrate emails, calendars, contacts, tasks from G Suite to Office 365, G Suite to Exchange, G Suite to IMAP Servers
    G Suite to Office 365
    Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to Office 365
    G Suite to Exchange Server
    Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to on-Premise Exchange Server
    G Suite to IMAP
    Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to IMAP, Outlook, Zimbra, Zoho etc.

    IMAP Migration

    EdbMails IMAP Migration tool lets you easily migrate emails from IMAP servers such as Outlook, Gmail, Zoho Mail, Zimbra, cPanel, and more. Supports IMAP to IMAP, Office 365, Exchange Server, PST, and bulk PST to IMAP migration.

    IMAP Email Backup & Migration
    Backup and migrate emails from IMAP servers to PST, Office 365, and On-Premises Exchange Server
    IMAP to Office 365
    Migrate emails, folders, and attachments from IMAP servers to Office 365
    IMAP to Exchange
    Migrate emails, folders, and attachments from IMAP servers to on-premises Exchange Server
    IMAP to PST
    Export emails, folders, and attachments from IMAP servers to Outlook PST files for backup
    PST to IMAP
    Migrate emails, folders, and attachments from bulk PST files to IMAP servers

    Duplicate Remover

    EdbMails Duplicate Remover lets you easily remove duplicate items from Office 365 and Exchange Server, and from IMAP, Outlook, Gmail, Zimbra, Zoho Mail, etc., ensuring a clean and organized mailbox.

    Remove Duplicates
    Easily clean up your Office 365, Exchange, Outlook and IMAP accounts by removing duplicate emails.
    Remove Duplicates from Office 365
    Remove duplicate emails, calendars, contacts, journal tasks, etc. from Office 365.
    Remove Duplicates from Exchange Server
    Remove duplicate emails, calendars, contacts, journal tasks, etc. from live Exchange Server.
    Remove Duplicates from IMAP, Outlook
    Remove duplicate emails, attachments from IMAP, Outlook, Gmail, Zimbra, Zoho Mail etc.

    Exchange, SharePoint, OneDrive, Teams and Office 365 Backup

    EdbMails enables secure, automated backup and recovery for Microsoft 365 services including Exchange Online, SharePoint, OneDrive, Teams, and Live Exchange Server with complete data protection and restore flexibility.

    Office 365 Backup
    Incremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup
    Exchange Server Backup
    Incremental, Granular, Encrypted and Compressed Exchange Mailboxes Backup
    SharePoint, OneDrive & Teams Backup
    Backup Online site collections, Team sites, Office 365 groups, all documents etc.

    EdbMails Data Recovery

    EdbMails Data Recovery Software lets you recover permanently deleted data, including photos, videos, documents, and archived files, from partitions on hard drives, SSDs, USB drives, SD cards, and external storage devices.

    EdbMails Data Recovery
    Recover and restore permanently deleted data from hard drives, SSDs, USB drives, SD cards, and etc.
    Whitepaper
    Request a Demo
    Sign Up
  • Features
  • FAQ
  • Offers
  • Pricing
  • Download
  • Support
  • Sign in
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
  • Set Office 365 Impersonation rights
    • Using PowerShell commands
    • Using Office 365 GUI
  • Map the Mailboxes
  • Multifactor Authentication
    • Enable MFA in Office 365
    • Create App password for MFA
    • Disable Security Defaults
    • Disable MFA in Office 365
  1. Home
  2. OST Recovery and Migration
  3. How to Split a Large OST File into Multiple PST Files?
Download Buy Now

Split an Oversized OST File into Multiple PST Files

Outlook OST files contain a complete copy of the mailbox data including emails, contacts, calendars, tasks, and notes. With increased mailbox usage over time these OST files can grow to be very large. If the file size becomes too large, it can slow Outlook down, create synchronisation issues, or even crash, especially if it is at or above the size limits for Outlook.

To maintain Outlook’s gradual performance and to ensure a steady access to data, it is often necessary to split huge OST files into smaller PST files. It’s easier to handle, better organised, and more convenient to back up and migrate smaller files, especially when it comes to older or archived mailbox data.

Split OST file with EdbMails settings

EdbMails OST to PST Converter is a powerful tool for precise conversion. It extracts data from large OST files and allows you to split them into multiple PSTs without losing folder structure and data integrity. You will be shown how to do it smoothly and securely in this step-by-step guide.

How to Split Oversized OST Files to Multiple PST Files during Export

  • EdbMails OST to PST Converter: You can use EdbMails OST to PST Converter. It has a built-in option to split OST files into multiple PST files in the export process, which makes it easier to manage the output files and easier to import them back to Outlook.
  • Enable PST Split Option: To enable the above feature, Open the ‘Settings’ menu and select – Automatically split PST file upon reaching the size during export. Specify the maximum size of each PST file to suit your needs.
  • Configure and Run the Export Process: Now that the size limit is in place, you can go ahead and do the conversion. The tool preserves the configuration and generates multiple PST files rather than one large file.
  • Ensure Safe and Smooth Export: This process saves PST from corruption, increases manageability and smoothens and makes the conversion of large OST files efficient.

Real time scenarios of EdbMails OST file split function

  1. Large email archives: Organisations that use MS Outlook for email communication frequently end up with large amounts of email data over time. Managing this data in one large OST file can become difficult to handle properly. EdbMails can split the OST file into multiple PST files that can be organised better, can be managed easily and can improve performance.
  2. Limited Storage Space: If you have limited storage space on your computer then managing large OST files can be a challenge. The splitting OST file into multiple PST files helps you to export and manage your email data more efficiently. It helps you to overcome the storage limitations along with keeping your Outlook performance uninterrupted.
  3. Enhanced data access: Break down large OST files into multiple PST files for simpler access to specific data. If you break the data into smaller files that are more structured , you can quickly search and access the information you need . It makes your work more efficient and the data easier to use.
  4. Compliance needs: Organizations may have certain compliance regulations demanding for specific file format or file sizes when it comes to storing email data. EdbMails can help you break OST into PST files in a hassle free way, which can satisfy such requirements and efficiently organize the data.

Additional resources

  • Migrate OST to Office 365
  • OST to Live Exchange
  • Outlook OST cannot be accessed
  • Log report
  • Granular recovery of OST file
  • Recover encrypted OST file
  • Recover deleted mailboxes from OST
lady image

 In this manual

IntroductionFeatures of EdbMails

OST to PST converter

Just $45 Onwards

Buy Now

Need help?

24/7 Customer support

Contact us on Live chat

Personalized Demo

Book a personalized demo

Still need help?

Email us / Call us

© 2026 Shifttocloud Inc. Privacy Policy | Terms of Use | GDPR | Security | Press Releases

hidden msg
Live Chat

Hi, May I help you?

Hide Chat Now