How to Migrate OST to Office 365 Without Losing Any Data? – Solved

Approved By Aswin Vijayan

Published On July 7th, 2023

Reading Time 5 Minutes Reading

Migrating from an on-premises Exchange server OST file to Office 365 brings numerous advantages, including improved collaboration, scalability, and accessibility. However, the process of importing OST to Office 365 mailbox can be complex for many users. In this article, we will guide you through a simplified step-by-step approach to successfully import your OST files to your Office 365 mailbox hassle-free.

Methods to Migrate OST to Microsoft 365 Account

Migrate data from local system to cloud is not an easy task. But this post will find you well and help you in completing the migration process.

Move OST to Office 365 using Third Party Tool
Import OST Files to Microsoft 365 Manually for Free

Let us discuss both the methods in details.

Method-1: Trusted Way to Import OST to Office 365 Account

SysTools has developed an advance utility that enable users to upload complete data from OST file to Microsoft 365 account. It ensures complete data migration with same folder structure, data integrity (Read/Unread status), and email header. Let us discuss working steps:

Steps to Migrate OST to Microsoft 365 Automatically

All the listed steps are verified and safe to use for both home and professional users.

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Step-1: Download OST to Office 365 Migration Tool Developed by SysTools and Launch on your system and Click on Add File button.

start import process

Step-2: Add your OST file either by choosing Add File for Single File or Add Folder for Bulk OST files. If you do not know the OST file location then choose Search feature.

add ost file

Step-3: Software will scan the browsed OST files and list all folders in software folder list panel. Here you can explore folders and preview complete data. After that click on Export button.

OST to Office 365 export options

Step-4: Now the Export window will appear with multiple export options. Choose Office 365 from the list and apply advanced settings if required.

select office 365

Step-5: Validate your Office 365 account and hit on Export button to start the migration process for OST to Office 365 account.

import ost to office 365

Method-2: Upload OST to Office 365 Account Manually for Free

Microsoft provides indirect solution to migrate your OLD emails into Microsoft 365 account. But all your emails should be in PST format. The complete process explained in below section, follow the instructions and import OST to Office 365 account.

Step 1: First Create PST File Using Your OST File

The first step in the process involves exporting process, which is compatible with Office 365. Several third-party tools are available to accomplish this task. One such popular utility is OST to PST converter, which ensures secure and reliable conversion without data loss. Download and install the converter, and follow the instructions.

Note: If you can access your OST file, then use Import/Export utility and save complete data into PST format. In case of orphaned, inaccessible, corrupted OST file, use above third party tool.

Step 2: Create a New Outlook Profile

To proceed with importing the OST data into your Office 365 mailbox, you need to create a new Outlook profile. This ensures a clean environment for the migration process. Follow these steps:

Open Control Panel and select “Mail”.
In the Mail Setup wizard, click on “Show Profiles”.
Click on “Add” to create a new profile, and give it a suitable name.
Enter your Office 365 email address and follow the prompts to complete the profile setup.

Step 3: Configure Office 365 Account in Outlook

After creating the new Outlook profile, it’s time to configure your Office 365 account. Here’s how:

Launch Outlook and select the newly created profile.
When prompted, enter your Office 365 credentials (email and password).
Follow the on-screen instructions to complete the setup.

Step 4: Import PST Files (Created in Step 1) to Office 365

Now that you have the OST files converted to PST format and the Office 365 account configured in Outlook, you can proceed to import the PST files into your Office 365 mailbox:

In Outlook, go to the “File” tab and select “Open & Export” > “Import/Export.”
Choose “Import from another program or file” and click “Next.”
Select “Outlook Data File (.pst)” and click “Next.”
Browse and select the PST file you converted earlier.
Choose the desired options for duplicate items, and click “Next.”
Select the destination folder in your Office 365 mailbox where you want to import the data, and click “Finish.”

Step 5: Monitor and Verify Migration

Once the import process starts, it may take some time depending on the size of the PST file and the speed of your internet connection. Ensure a stable internet connection throughout the migration process. Monitor the progress and verify the successful import of your OST data into Office 365 mailbox.

Conclusion:

Migrating OST files to an Office 365 mailbox does not have to be a daunting task. By following the step-by-step approach outlined above, you can simplify the process and ensure a seamless transition. With careful execution and attention to detail, you can effortlessly import your OST data to your Office 365 mailbox and enjoy the benefits of the cloud-based platform.