Thursday, November 3, 2022

Proven Techniques to Import OST File into Outlook 365

Import OST File to Outlook 365

Moving from one email platform to another is very common these days. In this write-up, we will talk about how to import OST file into Outlook 365 account. Here, you will get a manual solution as well as the professional solution to accomplish this task. To get the most effective answer, read this article thoroughly.


The OST files are offline Storage Table files created on Outlook for storing the data offline. These files are linked with the Exchange server and are used to store data like emails, calendars, contacts, etc. When the internet connection is lost, the users can still access their data from the OST files. 

The OST files are helpful as they allow the users to access their data even when they don't have internet connectivity. However, there are certain circumstances in which users need to import OST file into Outlook 365. In the upcoming sections, we will discuss the reasons and methods to migrate OST to Office 365 account.

Reasons to Import OST File into Outlook 365

There are many reasons to import OST to Office 365 account. However, the reasons that are given below are some of the prominent ones.

    When users change their organization, it is crucial to import OST files into Outlook 365 to access their data.

    Office 365 mailbox provides more capacity in comparison to PST.

    Sometimes, users may desire to save a copy of the data from the Exchange server in Office 365.

    You can easily access your data after the accidental deletion.

    By using Office 365, user can access their emails from anywhere.

These are some of the reasons why you need to import OST to Office 365. In the following section, we will discuss the different approaches that helps you to migrate OST file to Office 365 mailbox.

Method to Import OST File into Outlook 365 Manually

To migrate OST to Office 365 manually, First, we need to convert OST file to PST by using the "Open and Export" option, and then, we import PST files to Office 365 account. In this respect, perform the following steps to accomplish this task effectively.

Step 1: Convert OST file to PST via Open and Export Feature

    Firstly, start and log in to your Outlook application on your computer.

    Then, click on the File menu and select the Open & Export option.

    After that, choose the Import/Export option.

    Now, click Export to a file option and hit the Next tab.

    Afterward, select the Outlook Data File (.pst) and press the Next button.

    In the next step, select all folders you want to export and tap on the Next tab.

    Then, specify the location of the new PST file and choose to Replace duplicates with items exported option.

    At last, click on the Finish button to convert OST files to PST format.

These steps will enable you to convert OST file to PST format conveniently. In the next step, we will import these OST files to Office 365 account.

Step 2: Import PST File into Outlook 365 Account

    Firstly, log in to your Office 365 account in which you want to import these PST files.

    Now, select the Admin option from the left pane and click on the continue tab.

    In the next step, a pop will appear on your screen, in which you have to click on the Compliance tab.

    Now, choose the Information Governance option.

    Afterward, tap on the Import button to upload the PST file.

    Lastly, select the PST file and click on the Open button to convert the Outlook PST file into the Microsoft Office account.

You can use the manual method to convert OST to PST. However, the manual process is a complex and time-consuming task for some non-technical users. Also, if you are unfamiliar with the manual method, it can harm your data. 

Therefore, the most suitable way to upload OST to Office 365 is using an automated solution. In the following section, we will discuss the professional approach to adding OST files to Outlook.

Professional Way to Import OST File into Outlook 365

You can use the Best OST to PST Converter tool to import OST to Office 365 through an advanced approach. This software is integrated with many advanced features that help users to convert OST file into PST Outlook 365. Some of them are mentioned below.

    Users can convert OST files to PST, EML, MSG, EMLX, MBOX, and other file formats.

    Using this software, you can directly migrate OST file to Office 365, Gmail, IMAP, Hotmail, and many other free email clients.

    Users can remove unwanted emails from the conversion process that comes more than once.

    It also helps in maintaining the folder hierarchy throughout the conversion process.

    Also, it provides a free trial version through which a user can check the performance of this tool.


In this blog, we have discussed how to import OST file into Outlook 365 account. You can opt for a manual or an advanced software approach to accomplish this task. However, the manual method is not that easy to use as it is a complicated and time-consuming process for non-technical users. 

Therefore, the recommended solution to upload OST to Office 365 is using OST to PST converter tool is a safe and secure choice to accomplish this conversion.