How to Open PST File in Office 365? Complete Guide

Rollins Duke   
Published: May 10th, 2024 • 5 Min Read

In this write-up, we are going to show you how to open PST files in Office 365 using both manual and professional solutions. We will also provide complete information about the both PST file and Office 365.

As we all know, Microsoft Outlook is an email client that already has several inbuilt features that allow its users to save their data in the PST format. Many Outlook users also use Microsoft Office 365. Often, when users want to open PST files without Outlook in Microsoft 365, they don’t find a viable solution. So, here we are going to elaborate on some most effective methods to open PST files in Office 365.

Recommended: 4 Techniques to Import PST to Shared Mailbox Office 365

Let us take a little intro to PST and Office 365

PST File: PST is a Microsoft Outlook application file extension. It allows users to access multiple account items configured to this application for each user through a private data file. Whenever a new item appears, it will always save that data in the format of a .pst folder.

Office 365: It is webmail any new items will be saved to the database in Microsoft 365 and can only be accessed over the Internet via a browser.

Manual Methods to Open PST Files into Office 365

First, you have to configure both Outlook and Office 365 accounts, which must be an IMAP configuration, if you don’t know the procedure then just open the application and hit the File tab and choose the Add Account option and enter the login credentials of Office 365. After this, follow the steps mentioned below:

Steps to Open PST File in Microsoft 365

  1. Launch the tool on your system. On the taskbar, click the File tab, then Open & Export, and then, Import/Export.
  2. On the Import and Export Wizard, select Import from another program or file. Click Next to continue to open the PST file in Office 365
  3. Select Outlook Data File (.PST) in the Import a File dialog box. Click Next to continue the process
  4. Click the Browse button in the Open Outlook Data File dialog box to locate the PST file. After that, select the PST file, and click Open
  5. Finally, select the Do not insert duplicates option and click Next to continue the process.

As we can see, it is a lengthy process. Also, the Outlook email client must be installed on your computer properly. The chances of data loss are also high with this method. Moreover, as this process includes a lot of technicalities, non-technical users will not be able to use this method easily.

Professional Solution to Open PST File in Microsoft 365

The BitRecover PST to Office 365 Migration Tool is a professional application. Through this application, users can directly convert  PST files in Office 365 webmail. With the help of this application, users can open selective folders from PST files to Microsoft 365 webmail user accounts. Let’s discuss the working process of the software.

Step-by-Step to Open PST File in Office 365

  1. Firstly, install and run the suggested software on your system. Select PST files from your computer as a tool that provides dual options to add mailboxes.

    tool to Open PST File in Office 365

  2. Now, select the Convert configured Outlook mailbox data radio button

    Browse PST File

  3. After that, choose selective folders from the PST file for uploading

    selective folders

  4. Thereafter, select Office 365 as the saving format to open PST file in Office 365 mailbox

    Office 365

  5. Enter Office 365 account login credentials for continuing the migration process


  6. Selecting this option will enable you to perform Mailbox Mapping, i.e., Upload Different PST to Different Office 365 User Accounts

    Mailbox Mapping

  7. If you are Office 365 Admin, you can map every data file with desired Users. It will help you to open different PST files in different Microsoft Office 365 Users
  8. Finally, log in to your Office 365 webmail & view inserted PST files in your Microsoft Office 365 account.

    open PST file in Office 365

Software Benefits to Open PST File in Outlook 365

  • Through this application, users can directly open PST files to Office 365.
  • Users can open PST files in Microsoft 365 (OWA) account in batch.
  • By using the utility, users can upload complete PST files data like emails, contacts, calendars, and tasks to Office 365 online.
  • The tool can migrate selective folders from PST files into Office 365 webmail user accounts.
  • It shows all email folders before conversion to Exchange Online.
  • It is one of the best solutions to open Outlook calendar to Office 365 online cloud accounts.

Observational Verdict

In this article, we have discussed how to open PST files in Office 365. Many users face issues in completing this process. Here, they will find both manual and professional techniques to accomplish this task. The professional method to open PST files in Microsoft 365 is more safe and more effective than the manual method. The Demo version of this software is also available in which users can save up to 25 files for free.