How do I Export my Office 365 Mailbox to MBOX Format?

admin | how to MBOX Office 365 | 4 minutes read | Last updated on February 12th, 2025,

Although Office 365 is a remarkable online data management platform, still you are wondering how do I export my Office 365 mailbox to MBOX format. MBOX is a popular widely used file because it is easily accessible with many free email programs and text editors such as Apple Mail, Gmail, Thunderbird, Eudora, Entourage, and more, and more. This will make MBOX a convenient way to preserve copies of Office 365 emails for protection. Therefore, users need to export Office 365 mailbox to MBOX format.

So, in the following section we will be discussing multiple ways to perform the export process. Also, we will explain the direct approach i.e. MacMister Office 365 Backup Tool Mac & Windows to directly export Office 365 emails to MBOX with attachments without data loss.

Top Two Ways to Export Office 365 Mailbox to MBOX Format

There are two main procedures to export Office 365 emails to MBOX format – using Thunderbird and automated approach. We will cover them in the following section. Let’s explore the manual method followed by direct solution.

Method 1. Manually Export Office 365 Mailbox to MBOX Format

While Thunderbird has a free way to transfer Office 365 emails to MBOX file. Also, it includes many steps that could be lengthy and time-consuming for the ones who need to quickly export Office 365 mailboxes to MBOX file.

Step 1.  Synchronize Office 365 with Mozilla Thunderbird

  1. Download and run Mozilla Thunderbird on the system.
  2. Now, configure Thunderbird profile by using Office 365 email account.

Step 2. Create new Folder

  1. Inside Thunderbird, right-click Office 365 email account name which is generally appeared on the left sidebar.
  2. Click “New Folder” and mention a name “Office 365 Mailbox Transfer”.
  3. The folder will contain all the emails you will save temporarily from Office 365 account.

Step 3. Shifting Emails to New Folder

  1. Open the necessary Office 365 folder such as Inbox, Sent Items, etc. that holds the important emails you have to migrate.
  2. There are two ways to choose emails: press “Ctrl” key and select emails individually. Or, hold “Ctrl + A”            to select the entire list of emails stored in the folder.
  3. Alternatively, use the drag-and-drop method to transfer selected emails into newly created Office 365 Mailbox Transfer folder.

Note. Repeat the steps for every folder you want to save on a local system. However, the process is quite time-consuming as you have to implement the steps for every folder you want to save.

Step 4. Exporting to MBOX

  1. After the emails are moved to “Office 365 Mailbox Transfer” folder, then right-click on it.
  2. Select “Export…” from the options appearing.
  3. Choose the desired location of the system to export MBOX file.
  4. Lastly, tap Save button.

The method is free of cost but it has technical steps that are tedious especially when there are numerous mailboxes present to transfer. However, in the next section we will explore the fast way to export Office 365 mailbox to MBOX file.

Method 2. Directly Export Office 365 Mailbox to MBOX File

MacMister Email Backup Software Mac & Windows is a best method to directly export Office 365 mailbox to MBOX file with accurate emails and attachments. The application is simple and easy to use. It has 30+ webmail options; however users can select Office 365, add the credentials, and export Office 365 emails to MBOX saving type without data loss. Additionally, the user-friendly interface will simplify the migration for technical and novice users.

Moreover, the application has many incredible features with the help of users can export Office 365 mailbox to MBOX file according to the requirements. Furthermore, the software freeware edition will help users understanding the export process for free.

Working Steps of the Tool to Export Office 365 Mailbox to MBOX File on Mac

Step 1. Download, install, and open the app on macOS.

Step 2. Select Office 365 option from the left, add the credentials, and click Login button.

Step 3. The tool connects with Office 365 account and show Office 365 folder items on the left pane.

Step 4. Now, go to the right side of the application, click Select Saving Options, and select MBOX format from the list.

Step 5. Set MBOX sub-options according to the requirements and click Export button.

Step 6. The Email Backup Report will open which shows the live backup progress of Office 365 mailboxes to users.

The whole process will finish with a message “Process Completed”. Click OK button and go to the resultant MBOX files to view the content. However, you will see that the application has accurately implemented the conversion process. All the emails and attachments of Office 365 are appearing with precise content, layout, and metadata properties.

Epilogue

In the write-up, we have explained two ways to fix how do I export my Office 365 mailbox to MBOX file”. The first method is free to use but has some limitations that users should consider before purchasing it. The second is paid but reliable, secure, and easy to use. One can add Office 365 account, verify its listed folder items, select MBOX files and directly export Office 365 mailboxes into Office 365 account without data loss. Also, it has a free demo edition with the help of users can experience the entire process for free. One can even to export first 25 Office 365 emails for free.