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How to import Outlook mailboxes from OST file to Office 365

Published on 02 June 18

Office 365 is subscription plans from Microsoft for MS Office programs including Outlook and many other cloud-based services. Having an Office 365 account or subscription is very beneficial for MS Outlook users like access emails from any location and any device due to a cloud-based system if connected to the internet and more storage space for your mailboxes. So, these days many Outlook users want to save offline OST files data to the online server of Office 365. There are two ways to perform this action manually and using a third-party software.

How to import Outlook mailboxes from OST file to Office 365 - Image 1

How to export OST data to Office 365?

You just can’t directly export data from OST file to your Office 365 account from MS outlook application. Here you have to convert OST file to PST file and then you can upload PST file to Office 365. But, this method is complicated and there many cons with this method like risk of data loss and if OST file is damaged then you can’t even convert it to PST file directly from MS Outlook. So, the best method is migrate OST emails directly from OST file to Office 365 using third party OST migration Tool.

Method 1: Manually convert OST to PST then migrate to Office 365.

In this method first, you have to convert OST file to PST file using MS outlook Import/Export Feature and then upload to office 365 manually. This is an indirect method for OST to Office 365 migration.

Step 1 – Manually convert OST file to PST. Read this blog for manual conversion process of OST to PST using MS Outlook. Read this blog for full process.-

Step 2 – Use Network Upload to import converted PST file to Office 365. Read this article from Microsoft office support for full procedure. -

Method 2: Export OST file to Office 365 directly using third party software.

This is easiest and safest method for OST to Office 365 migration. You can directly export data from OST file to Office 365 account in just a few steps. There is no risk of data loss or any changes in original OST data during migration process to Office 365.

Steps to transfer data from OST to Office 365 –

  1. Download OST to PST Converter and install to your Windows PC.
  2. Run the Software and click Open.
  3. Browse and Select Exchange OST file and click Next.
    How to import Outlook mailboxes from OST file to Office 365 - Image 2
  4. The software will start scanning and accessing all emails and other data from OST file. How to import Outlook mailboxes from OST file to Office 365 - Image 3
  5. Now select on Office 365 option and input your Office 365 account details.
  6. Next, click on Connect to Server and Import button and start the migration of OST to Office 365.How to import Outlook mailboxes from OST file to Office 365 - Image 4
Summary: Manual method to Migrate OST to Office 365 is complicated and lengthy. There are also many drawbacks of the manual method. So, Using OST to PST Converter is the best method to export emails, contacts and other data to Office 365 account.

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  1. 12 September 20

    Don't waste your time by using the ordinary method to recover and convert data from OST file to PST file because it is very tricky and time-consuming. Therefore, I suggest the best conversion software that is very famous in the data conversion field. That software name is SysOZ OST to PST Converter application that is equipped with several advanced features. This tool also allows you to export OST data into multiple file formats like PST, EML, EMLX, MSG, vCal, vCard, MBOX, etc according to user's need. Read More:

  2. 22 March 19

    You can also try Dux OST to PST converter software which is able to convert Outlook ost file to Office 365 with in less time. For more details -

  3. 18 March 19

    By using Stella OST to PST Recovery software you can recover damage OST file data and convert OST to PST. Read more:-

  4. 08 September 18

    Thanks for this helpful article. As we know that if you are using the manual way to Export OST file into Office 365 then you need to convert your OST into Outlook PST format. After it you can migrate from PST to Office 365. But here I am recommended you a third-party tool, and there are many applications available so I suggest you the best third-party software which is MaisDaddy OST to Office 365 Migration Tool. With this application you can easily convert your OST file data like emails, contacts, calendars, appointments, and attachments etc into O365 Exchange Online Mailbox.

  5. 06 September 18

    Get the effective tool to convert OST file data into an Outlook PST format. It's easily recover your corrupted or inaccessible OST files, data and gives the reliable or accurate result to the user. This tool provides user friendly interface, without any technical knowledge you can use this tool very simple and it gives result as your requirement. The tool support all versions of Windows Operating system and MS Outlook. See more info at:-

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