How to Import MBOX to Office 365: Step-by-Step Guide (2026)

Summary: As remote and hybrid work become the norm, organizations import MBOX to Office 365. This will ensure that the emails are securely accessible anytime and from anywhere. Now, how to accurately import the MBOX file to an Office 365 account? Continue to read this blog till the end to learn about the manual and direct approach using the MacSonik MBOX Converter. With this converter tool, users are assured of a reliable, error-free, and hassle-free file conversion experience.

Why Import MBOX File to Office 365?

By importing the MBOX data into Office 365, users improve collaboration and help them preserve old emails. Take a look at the various practical reasons why this import is necessary:

• Users import their MBOX files into Office 365 to centralize the scattered email data in one place.
• Importing MBOX files to Office 365 enables users to have cloud-based access while staying connected across devices.
• Office 365 offers robust data protection and security protocols, safeguarding historical emails from unauthorized access. 
• Microsoft 365 allows teams to collaborate efficiently, boosting productivity across departments.
• By moving the MBOX archive into Office 365, valuable email records get organized and accessible. 

Effective Ways to Import MBOX to Office 365

Read this section to solve your query: How to transfer MBOX files into Office 365? For Windows users, you have both a manual and an automated method, while the manual process can be complex and useful for importing a limited number of files. If you’re a Mac user, the automated tool is your only option. Now, we will explore the manual procedure for Windows users. 

Manually Migrate MBOX to Office 365 

To accomplish this task manually, you have to go through all the steps. The steps are: 

• Convert MBOX files to EML, 
• Copy & paste EML files into the Outlook application,
• Save the EML file into PST, and
• Import PST files into Office 365. 

Once you complete all four major steps, you will be able to import the MBOX to Office 365 successfully. 

Step 1: Steps to Save MBOX into EML

1. Open the MBOX-supported email client like Thunderbird.
2. After this, import all the MBOX files from your system to Thunderbird.
3. Then, drag and drop these files from Thunderbird to the desired location in your system. 
4. Now, all your files will be saved in the EML file format at the desired location. 

Step 2: Drag and Drop the EML file into Microsoft Outlook

1. Launch Microsoft Outlook. 
2. Then, create a new folder in your Outlook application. 
3. Now, drag and drop your EML file from your system to the newly generated folder. 

Step 3: EML to PST Conversion With MS Outlook

1. To convert EML to PST, start the Outlook application. 
2. Next, go to the File option and then Open & Export >> Export.
3. Then, opt for Export to a file >> tap Next.
4. Further, choose Outlook Data File (.pst) and then hit Next.
5. Subsequently, browse and select the folder for conversion. Press Next.
6. After this, choose the location to store your output PST file. 
7. Now, click the Finish button to start the process. 

Step 4: Transfer PST File into Microsoft Office 365

Before you start, make sure your Outlook is synced with the MS Office 365. 

1. First, visit the File >> Open & Export >> Import.
2. Now, choose Import from another program or file and hit Next.
3. Afterwards, select Outlook Data File (.pst). Tap Next.
4. Thereafter, opt for the previously converted PST file from your system. 
5. At last, click Finish to Import PST to Office 365.

As you can see, the above procedure is lengthy and complicated. As a result, it will increase the chance of data loss. If you’re worried about using this method, we have another automated solution for secure and smooth outcomes. 

Professional Procedure to Import MBOX to Office 365

Using the MacSonik MBOX Converter for Mac is the best option if you have multiple or large MBOX files for conversion. This software has an easy-to-use interface that will help you to import MBOX to Google Workspace, Office 365, and other email services. Additionally, it offers numerous advanced features to enhance productivity, such as excluding duplicates, importing selective emails, and many more. Also, it will provide accurate and risk-free results in a few seconds. 

Follow the steps below to successfully convert MBOX to Office 365:

1. Firstly, install and start the converter tool. 
2. After that, tap Select Files or Select Folders to add an MBOX file. Click Open >> Next. 
3. Then, view the content of the added MBOX file and tick for further proceeding. Hit Next. 
4. Pick Office 365 from the Email Clients drop-down list. 
5. Next, enter the credentials of your Office 365 account and press Sign In. 
6. Lastly, tap Convert to start the procedure of importing MBOX to Office 365. 

Also Read: Import MBOX to iCloud

Conclusion

In this blog, we have explained the methods and simple steps to import MBOX to Office 365. If you’re a Windows user, you can use either manual or professional. In case you have limited MBOX files, the native procedure is effective. However, the professional technique using MacSonik MBOX Converter will help you complete the process with no downtime. Also, this software works on both Mac and Windows OS with the same effectiveness.

Also Read Apple Mail Not Importing MBOX File

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