how to import ost file in outlook office 365

How to Import OST File in Outlook Office 365?

This blog has the solution you’ve been searching for a method on how to import OST file in Outlook Office 365. We will go over the entire process of migrating from OST to Office 365 utilizing a free and automated method in this article. The greatest OST to PST Converter, which can import OST files into an Office 365 account, is what experts have long advised. Thus, keep reading this piece as we’ll walk you through the greatest options for doing so.

Since the release of Exchange Online, users can benefit from the extremely sophisticated features of Exchange servers without the need for an on-premises Exchange server within their companies. Additionally, the MS Office 365 premium business and corporate versions package includes Exchange Online. It is therefore available for purchase as a stand-alone program, but with Office 365, it is integrated with other Office 365 programs. Consequently, the advantage of having a subscription plan is that you can purchase a license based on the quantity of customers. Let’s now discuss some of the reasons for importing the OST file before getting straight to the solution.

Reasons for Moving OST Files to Office 365 Cloud Account

Importing Outlook OST files to Office 365 accounts is beneficial for many reasons. We’ve mentioned a few of them below in this section.

  • To avoid exchange server crashes, a dependable platform is required.
  • When the crucial information was erased.
  • when an organizational change occurs as a result of Office 365 benefits.
  • with minimal interruption to exchange maintenance.
  • Fast data access in a secure setting in the event of an unintentional deletion.
  • Knowing the explanations for each of the aforementioned issues, let’s move on to the OST file import solutions. We have covered the procedure in great detail in the following section.

How to Import OST File in Outlook Office 365 Manually?

We have divided this free manual approach into two steps. The first step requires you to import a PST file into your Office 365 account after converting the OST to PST format. Below, we’ve covered each of the two sections. You can carefully follow each method’s step-by-step instructions.

Part 1: OST File Conversion to PST Format

  1. Open the Outlook program and select the File tab.
  2. On the Open & Export tab, select the Import and Export option.
  3. Click the Next button after selecting the Export to a File option.
  4. Click Next after selecting the Outlook Data File (.pst).
  5. Select the Folder to export after that, then move on to the next stage.
  6. Next, locate the new PST file on your computer at a Specific Location and select the items exported option to replace duplicates.
  7. Finally, to convert the OST to PST file, click the Convert option.

Users can successfully convert their OST files to PST format in the section above. Next, in order to import Outlook OST to Office 365 mailbox, users must import the converted PST file into their Microsoft 365 account.

Part 2: PST file import into an Office 365 account

  1. Enter your credentials to log in to an Office 365 account, then select the App Launcher.
  2. To carry out the remaining steps, select the Admin tab from the left pane.
  3. Here, you’ll see a new pop-up window where you can select the Compliance tab.
  4. Next, choose the option for Information Governance.
  5. To upload the PST file in the following step, select the Import button.
  6. Finally, to convert the Outlook PST file into a Microsoft Office account, select the PST file and click the Open option.

Importing Outlook OST files to Office 365 accounts are made possible for users by the two sections of the manual procedure mentioned above. Nevertheless, using the aforementioned strategy can be challenging. As a result, we have developed an automated method to easily import OST emails into Microsoft 365 to resolve this issue.

Automated Solution to Import OST File into Outlook 365 Account

The fastest way to convert OST files into Office 365 and other file formats or email clients is to use a trustworthy OST Converter application. The program allows for the conversion of numerous OST files. Additionally, this utility’s straightforward user interface makes it possible to utilize it without any technical expertise. In addition, the program converts OST files compatible with all Microsoft Outlook versions.


The expert method and instructions for importing Outlook OST files into Office 365 are highlighted in the aforementioned free technical guide. But because the manual procedure is so intricate, we have developed a thorough, expert method that gives the desired outcomes. In addition, the program does a good job of converting OST files into a variety of other file formats and email clients.

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