EdbMails EDB Recovery and Migration software
  • Products
    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
    Go to products
  • Features
  • FAQ
  • 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
  • Map the Mailboxes
  • Multifactor Authentication
    • Enable MFA in Office 365
    • Create App password for MFA
    • Disable Security Defaults
  1. Home
  2. Product
  3. Split a large OST file to multiple PST files
Download Buy Now

Split an oversized OST file into multiple PST files

Outlook OST files contain a full mirror of mailbox data such as emails, contacts, calendars, tasks, and notes. Over time, as mailbox activity increases, the OST file can grow significantly in size. This can lead to performance slowdowns, sync issues, and in some cases, Outlook crashes—especially when the file size approaches or exceeds the application’s limits.

To keep Outlook stable and ensure data remains accessible, it becomes essential to break down large OST files into smaller PST files. This makes data easier to manage, supports better organization, and simplifies tasks like backup and migration—particularly when dealing with older or archived mailbox content.

Split OST file with EdbMails settings

EdbMails OST to PST Converter offers an efficient way to handle this task with accuracy. It extracts data from large OST files and helps you split them into multiple PSTs without compromising folder structure or data integrity. This step-by-step guide walks you through the process, ensuring a smooth and secure outcome.

Practical scenarios of the OST file split feature in EdbMails

  1. Large email archives: Organizations that rely on MS Outlook for email communication often accumulate large volumes of email data over time. Storing this data in a single large OST file can make it challenging to manage effectively. By using EdbMails, organizations can split the OST file into multiple PST files, allowing for better organization, easier management, and enhanced performance.
  2. Limited storage space: If you're facing limited storage space on your computer, managing large OST files can become challenging. Splitting the OST file into multiple PST files allows you to export and manage your email data more efficiently, helping you avoid storage constraints while keeping your Outlook performance intact.
  3. Faster data retrieval: Converting a large OST file into multiple PST files makes it easier to retrieve specific data. By organizing the data into smaller, more structured files, you can quickly search and access the information you need, improving both efficiency and usability.
  4. Compliance requirements: Certain organizations may have compliance regulations that require email data to be stored in specific formats or within certain file size limits. By splitting the OST file into multiple PST files with EdbMails, organizations can easily meet these compliance requirements while maintaining efficient data management.

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

@edbmails.com All rights are reserved Privacy Policy | Terms of Use | GDPR | Security | Press Releases

hidden msg
Live Chat

Hi, May I help you?

Hide Chat Now