MBOX to Microsoft Outlook 365 Migration – Solution for Mac Users

Mark Briggs | December 27th, 2022 | Mac OS X, MBOX

Let’s discuss how simply one can import MBOX to Outlook 365 Mac. The article will guide you on the different methods to perform the task with complete accuracy. 

“Hi, recently I exported Gmail email files in *.mbox format for backup. Like there are around 2GB of email data in MBOX format. Now, I want all my Gmail MBOX files on Office 365 Outlook Mail. Please suggest any application to transfer MBOX files to Outlook 365.”

Our support team received this query recently. Now read the article to find out the what program will help you to import MBOX to O365 Outlook on Mac. 

Overview of MBOX & Outlook 365

MBOX files are one of the common formatted files we all have. Different email clients used MBOX file formats – Eudora, Thunderbird, Apple Mail, etc. Also, Gmail emails can be exported to MBOX format. However, there are a few email clients that do not support the MBOX file format – like Microsoft Outlook. 

Outlook 365 i.e., Microsoft Outlook comes with Office 365 suite, commonly known as Outlook Web App (OWA). The Outlook for Office 365 is used by large organizations and is available for O365 subscribers. To import MBOX to Outlook 365 Mac one must either convert the files to PST or migrate the email files directly to Office 365. 

Now, go through the major reasons or need for MBOX to O365 Migration on Macintosh OS. 

Need to Import MBOX to Outlook 365 Mac

As per the discussion above, it is clear Outlook 365 is a part of the Office 365 suite. With O365 one can work virtually anywhere without worrying about data security. Moreover, the user is shifting to Office 365 due to the vast number of features – storage capacity, no data loss, automatic application updating, and more. Altogether O365 is the best option for businesses and organizations. 

Manually Import MBOX to OWA Mac 

The manual or common practice of transferring MBOX to O365 is with the help of Thunderbird and Outlook. Use this method to export MBOX to PST format

  • Launch Thunderbird, and select the email or folder for migration, or select the entire folder. 
  • Right-click and go to Save As
  • Now, store the files in a specific location. And then open an Outlook account. 
  • Then drag and drop the saved mbox files to a new folder.
  • Thereby, all the files will be saved in PST format. 

Limitation: This method is applicable only to a limited email client. That results in importing only a few emails *mbox files. Along with that, one must have Mozilla Thunderbird and Outlook.

Directly Import MBOX to Outlook 365 Mac – Automated Solution

To overcome the limitations of the manual method and import MBOX to Outlook 365 Mac, we have MacUncle MBOX Converter for Mac. The tool can be used for the direct migration of MBOX files to O365 without having any external application. The utility has a direct option to transfer the *.mbox files to Office 365 without going through any conversion. 

Download for Mac Download for Windows

All the data is imported by maintaining the data integrity and email structure & components – To, Cc, Bcc, Subject, etc. The application support files from all common MBOX email clients Gmail, Thunderbird, Apple Mail, etc. Get the complete procedure to import MBOX emails to O365 on macOS Machine.

Steps to Transfer MBOX to OWA Mac 

Download and start the tool on any macOS 10.8 and above edition. Then, carry out the steps mentioned here: –

Step 1. Add *.mbox files to the software using Add options from File(s) or Folder(s). To proceed press Next

Use software to Import MBOX to Outlook 365 Mac

Step 2. Soon the tool will open a new window with all the MBOX files/folders. Now, select any or all files as per the demand and again press the Next button. 

Add MBOX files to the Panel

Step 3. Now, choose the IMAP option and enter the details of Office 365 in the required field. 

Use IMAP option and Enter the Credentials

Step 4. And press the Export button to start the process of MBOX to Office 365 migration on Mac OS. 

MBOX to Outlook 365 Migration on Mac Completes

As a result, all the email files in MBOX format will be transferred to Outlook 365 without any trouble. 

Test the trial version of the application and then later upgrade to the Pro version for unlimited migration of email files to Outlook 365. Check the application with the trial version and then use the button below to get the required package of the software.


Frequently Asked Question

Can I transfer my Mac Mailboxes to Office 365 Mac?

Yes, all types of MBOX files can be imported to O365 regardless of where the MBOX files are exported from.
Refer: Transfer Mac Mailboxes to Office 365

What are the requirements while operating the tool on macOS?

There is no such high requirement while executing the task of MBOX to Outlook 365 migration. The tool supports Mac OS X above 10.8 Mountain Lion.

Does the tool convert the MBOX files before migration?

No, the utility performs a direct procedure. No conversion takes place, all the files can be imported directly to Outlook Web App(Outlook 365).

Will I be able to import MBOX files to Outlook 2016 using this procedure?

Yes. Once the email files are scanned and loaded to the panel, select the PST/IMAP/Outlook.com option to import directly to Outlook.


In final words, the write-up has all the detail of MBOX to Office 365 migration. Use this method to transfer all the MBOX files – email, contact, calendar, etc. to OWA. In a few clicks, you can import MBOX to Outlook 365 Mac with complete details. The general method for MBOX to Outlook Office 365 migration is possible only if you have installed Thunderbird and Outlook.