OST to Office 365 Migration Tool

Migrate OST File to Office 365 Account with Complete Security

(Average Rating 4.3 Based on 1579 Ratings)
  • Fully automated tool to import single and multiple OST files to Office 365.
  • Suitable to upload OST to Office 365 primary, shared, and in-place archive mailboxes.
  • Automatically add OST data file in GUI from default location of configured Outlook.
  • It uses OAuth authentication for security verification using account credentials.
  • Import OST file in Office 365 including emails, contacts, calendars, task, and notes.
  • Combine OST files with existing Office 365 Folders using Copy to Default Folders Option.
  • Use Recovery Mode to add corrupt OST files for missing folders.
  • Migrate selective folders from OST file to Microsoft 365 cloud account.
  • Provides filter options like Date Range, From/To, Subject, Exclude Folders, Organizer, etc.

OST to Office 365 Migration Tool Box




OST to Office 365 Migration Tool Features

Import OST File to Office 365 Account with All Data

Bulk Migrate OST to Office 365

Bulk Migrate OST to Office 365

OST to Microsoft 365 Migration Tool allows to upload OST to Office 365 email account in batch without size limitations. Hence, our respective client can save much time and effort while completing OST files to Office 365 migration process including emails, contacts, calendars, and other crucial data. Even this software is compatible with OST files of Outlook, Exchange, Office 365, IMAP, and Orphan.

Add OST Files

Multiple Choices to Add OST Files in GUI

  • Convert Configured Outlook Mailbox Data: Enable this option to add OST files automatically from configured Outlook profile.
  • Select Files: Use this option and press CTRL and choose specific OST files from your pc to migrate them into Microsoft 365.
  • Select Folders: Enable this option to add a whole folder including various OST files for migration. However, later you can check only specific files accordingly.

Recovery Mode

Use the Recovery Mode for Missing Results

If you are getting some files missing after completing the process to migrate OST file to Office 365. Then you need to enable the ‘Use Recovery Mode’ option which can repair OST files and upload them into Microsoft 365 cloud-based account with 100% accuracy. This feature is most effective if you are getting incomplete folders at the destination account.

Shared Mailbox

Add OST File in Office 365 Shared Mailbox

To import OST files to Office 365 Shared Mailbox, you need to log in with Office 365 Admin credentials & check “I am Admin”, under the select Mailbox option, select Office 365 Shared Mailbox email id from the drop-down menu. This will help to upload OST files to Office 365 Shared Mailbox.

Primary Mailbox

Migrate OST File to Office 365 Primary Mailbox

There are two separate options offered by the software, i.e.: Export to Primary Mailbox & Export to In-Place Archive Mailbox. When you select Primary Mailbox, it migrates OST files into your chosen Office 365 Primary Mailbox Admin/ User account. This is the first kind of mailbox you can get by chance since receiving an Office 365 subscription. This is a mailbox with a password-included license.

In-Place Archive Mailbox

Import OST to O365 In-Place Archive Mailbox

If you have enabled an in-place archive in your Office 365 account to get extra storage space to store old email messages. Then OST files can be imported by the program into an Office 365 In-Place Archive Mailbox. This is a special mailbox that provides more storage space to the users. This function is inactive by default, but you can enable it according to requirements.

Mapping of Users

Perform Mailbox Mapping of Users

The application offers the "I am Admin" checkbox button, specifically for Office 365 Administrators and signing in with Admin Privileges, to better handle and provide access to an organization's various users. Under this option, the Mailbox Mapping Tab allows administrators to transfer OST files to individual users of Office 365. The Select button under this tab includes a sub-menu that shows a list of Office 365 users. OST to Office 365 Migrator helps to import unique OSTs using Mapping Field to distinguish users.

9 Foreign Languages

Supports 9 Foreign Languages for O365

9 different languages are supported by the software: Dutch, English, French, German, Spanish, Swedish, Norwegian, Italian, and Finnish. For those who choose to use Office 365 depending on language choice, the software automatically converts the folder name to the desired language. For instance, if you select the chosen language as French, the “Task” folder name will be imported with the Aufgaben name & Inbox as Posteingang.

Copy to Default Folders

Enable and Use Copy to Default Folders

Copy to Default Folders is also supported by this program. Check this option allows you to combine OST files data with existing Office 365 folders like Inbox to Inbox or All Mail to All Mail. Unchecking this option would import OST to a new folder name on Office 365 Webmail account. E.g.: 03-11-202 Office 365 Folders.


Selective OST to Microsoft 365 Migration

Before migration, the OST to Office 365 Converter reveals every OST file directory. For users who need to transfer selective folders from an OST mailbox into an Office 365 user account, this choice is beneficial. You can exclude Deleted Items, Sent Items, Contacts, Calendars, etc. folders from migration.

Filter Options

Use Filter Options for Selective Migration

This amazing application provides Filter options to import OST file to Office 365 Accounts by date range, email address, and email subject. You can also enable Exclude Folders, Organizer, and Root Folder options accordingly. Users can also enable only desired data like Mails, Calendars, and Contacts for the migration process.

Tracking Log Reports

Build Tracking Log Reports

Two log files can be created by the OST to Office 365 converter software Exception Log & SavingLog.txt format. The Exception Report makes it possible to control and record all the software-generated exceptions. This involves checking all the software's insights & failures. Savinglog.txt provides the ability to create a log file that explains all the specifics of the transfer after data conversion, such as Start Date & Time, and Saving Type. Path, Converted items, Destination folder for Office 365, Status, etc

OAuth Authentication

OAuth Authentication to Upload OST to O365

This utility makes it easy for users in the way it directly migrates OST files to Office 365 accounts without compromising the data quality and security. It requires only the valid credentials of an Office 365 account to complete OAuth authentication to migrate OST file to Microsoft 365 with security.

Get Pixel Perfect Email

Get Pixel Perfect Email During Migration

This OST to Microsoft 365 Migration Tool is all set with various impressive features that make it simple for users to perform the migration process. The tool conservers the integrity of data in its exact form after its migration, i.e., styling, formatting, Metadata, etc.

OST to Office 365 Migrator Specification

Know Minimum System Specifications to Download & Use the App with Ease

Software Box
Software Download
Size 28.2 MB
Version 13.3 MB
Take A Trial - Freeware edition of this software allows to upload first 25 items from each OST folder to Microsoft 365 folder.
1579 Ratings

Free Demo Version

First, download the free demo edition of this software to evaluate the tool before purchase by importing the first 25 emails from OST folders to Office 365 with complete details. After complete satisfaction purchase the license edition to avoid all the limitations.

System Specifications

Hard Disk Space
150 MB of free hard disk space

Minimum 2 GB RAM is required

Intel® Pentium 1 GHz processor (2.4 GHz is recommended)e

Supported Editions

Microsoft Windows – Windows OS 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) & Windows Server 2022, 2019, 2016, 2012 R2, 2008, etc.

OST Files – Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003, and old versions. Exchange Server 2019, 2016, 2013, 2010, 2007, 2003, and previous editions.

Microsoft 365: Microsoft 365 Business (Basic, Standard, Premium), Office 365 Enterprise (E1, E3, E5), Microsoft 365 (F1, F3, E3, E5), Microsoft 365 Education (A1, A3, A5).

OST to Office 365 Migration Tool Free and Licensed Version Comparison

Understand the difference to upload OST file to Office 365 using both editions.

Features Free Version Full Version
Upload single and multiple OST files
Facility to select specific folders
Import OST to O365 primary and in-pace archive mailbox
Freedom to map users with specific OST files
Supports user and admin mailbox migration
Compatible with ANSI and Unicode OST files
Suitable for latest Windows 11 and old versions
Limits to import OST file to Office 365 First 25 items per folder All items from all folders
24 hours technical support
Cost FREE $99

OST to Office 365 Migrator FAQs

User Queries with Expert Reply to Migrate OST File to Office 365

How to import OST to file in Office 365?

Steps to import OST file into Office 365 account:

  1. Run OST to Office 365 Migration Tool on your pc.
  2. Add OST files in the software window.
  3. Select Office 365 folders from the software GUI.
  4. Choose Office 365 as saving and complete OAuth authentication.
  5. Use additional settings and user mapping accordingly.
  6. Press Convert to start OST to Office 365 migration.

3 Steps to upload OST to Office 365 free:

  1. Start Microsoft Outlook desktop client.
  2. Export Outlook OST file to PST using Import/Export Wizard.
  3. Use Network Upload Method to import PST to Office 365 shared mailbox.

You need to configure or connect your Outlook 365 account with desktop Outlook using IMAP protocols. Thereafter, An OST file will be created at the default storage location to store your Outlook 365 data.

You can use BitRecover OST Viewer to access OST file data without Microsoft Outlook free of charge.

Yes, OST to Office Converter use OAuth authentication to complete security norms while uploading OST files to Office 365.

OST to Office 365 Converter Client Testimonials