Guide on How to Save EML Files to Office 365 Manually

EML is a commonly used email file format for storing individual messages along with their email content and attachments. When users have a collection of EML files and want to make them available in an Office 365 mailbox, the migration can be challenging because Microsoft 365 does not provide a straightforward option to import standalone EML files directly into an online mailbox.

One possible workaround is to first load the EML files into Windows Live Mail, move them into Microsoft Outlook, create a PST file, and then upload that PST data to Office 365. Although this approach can help complete the migration, it involves several stages and requires multiple email applications.

How to Move EML Files into Office 365 – Manual Way

Step1: Select EML Files in Windows Live Mail

• Install and launch Windows Live Mail on a Windows computer.
• Configure an email account if required.
• Create a separate folder within Windows Live Mail for the imported messages.
• Open the location containing your EML files.
• Select the required messages and drag them into the newly created Windows Live Mail folder.
• Wait until all selected EML messages appear in the folder.

Step2: Move Windows Live Mail Messages in Outlook

• Open Windows Live Mail and locate the folder containing the imported EML messages.
• Go to the File menu and select the email export option.
• Choose Export Messages and select the Microsoft Exchange option.
• Select the folder containing the EML messages or choose the required folders.
• Confirm the operation and allow Windows Live Mail to export the messages to Outlook.
• Open Outlook afterward and verify that the emails are present.

Step 3: Generate PST File from Outlook

• Launch Microsoft Outlook.
• Open File and select Open & Export.
• Choose Import/Export.
• Select Export to a file and continue.
• Choose Outlook Data File (.pst).
• Select the folder containing the imported emails.
• Specify the destination location for the PST file.
• Click Finish to create the Outlook data file.

Step4 - Import the PST Emails in Office 365

The final stage involves importing the newly created PST file into the required Office 365 mailbox. Microsoft provides PST import procedures through its Microsoft 365 administration environment. The exact process can depend on the Microsoft 365 setup, permissions, and available administrative tools.

Drawbacks of the Manual Approach

• The complete procedure involves multiple migration stages.
• Windows Live Mail and Outlook are required during the process.
• Creating a PST adds an additional intermediate step.
• Processing a large collection of EML files can take considerable time.
• The method requires familiarity with different email applications.

Users who want to avoid the lengthy multi-stage process can use MacMister EML Converter for Mac as an alternative. The application is designed to transfer EML files directly to Office 365 without requiring users to first import the messages into Windows Live Mail and then create a PST through Outlook.

Conclusion

For users working with a large number of EML files on Mac, MacMister EML to Office 365 on Mac tool can simplify the process by providing a direct and batch-based approach. This avoids much of the repetitive work involved in the manual method and provides a more convenient way to move EML data into an Office 365 account.