A Complete Guide to Import EML to Office 365

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admin

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Updated on
September 17, 2025

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6 minutes Read

Summary: Many professionals and businesses keep EML files as a backup when switching between email clients. But when they move to Microsoft 365, they need a secure way to bring those emails into Office 365. EML files are simple email messages saved individually, but Office 365 works online and uses Outlook Webmail. This blog explains the manual method to ensure you don’t lose any important messages. Along with a reliable professional MacSonik EML Converter Tool to quickly import EML to Office 365 with 100% accuracy.

EML and Office 365

An EML is an individual email message generated by mail applications, such as Windows Live Mail, Thunderbird, and Outlook. It preserves the formatting, attachments, and headers from the initial email. Whereas Office 365 is a cloud-based service that provides access to Outlook, OneDrive, Teams, etc. Moreover, this allows you to access emails and files from anywhere and features advanced security and collaboration tools. Importing EML files into Office 365 gives you the benefit of secure email while preserving your older messages.

Basic Steps to Import EML to Office 365

1. To start, you will need to install the EML Converter Tool and open it.
2. Next, click Select File/Folder to add your EML files or folders to the software.
3. After that, preview the emails and select the emails that you would like to migrate, then click Next.
4. Then, change the saving option to Office 365 from the Email Clients dropdown option.
5. Next, put in your Office 365 email ID and password to log in.
6. Finally, put the necessary filters or options as desired. When you are ready, click Convert, and the migration will begin.

Reasons to Import EML file to Office 365

There are several benefits to Microsoft 365:

• Access from anywhere: All emails are in one account, which is secure and cloud-based.
• Higher level of protection: Advanced encryption and compliance features to keep the content of your emails safe.
• Team collaboration: Microsoft 365 is linked with other Microsoft services like Teams, OneDrive, and SharePoint to collaborate.
• Seamless mobile access: Your imported emails are easily accessible on your mobile devices, desktops, or through the web.
• User-friendly interface: It provides a simple and clear interface that is best for fresh users.

Preparation Before You Import EML to Office 365

• Back up your EML files onto an external drive to protect against accidental data loss.
• Ensure you have an active Office 365 subscription and can log in.
• Find your Microsoft 365 login credentials.
• Ensure that you have a good internet connection to make the migration as seamless as possible.
• If multiple mailboxes are being imported, let your team know to avoid confusion.

Free Method to Import Multiple EML Files to Office 365

You can upload EML emails to Office 365 for free using the Outlook desktop client:

1. First, open Microsoft Outlook on your PC and add your Office 365 email account.
2. Now, allow Outlook to sync with your Office 365 mailbox.
3. After that, find the folder on your PC where your EML files are saved.
4. Further, open Outlook and navigate to the folder where you want to save the emails.
5. And, drag the selected EML files from your folder and drop them into that Outlook folder.
6. Finally, once dropped, Outlook will upload these emails to your Office 365 mailbox.

Demerits of Using the Manual Method

• Drag-and-drop is only practical with small batches of EML files.
• When importing large EML collections, Outlook could freeze or crash completely.
• Attachments or metadata may not be perfect when imported.
• It can be slow and impractical for bulk transfers.
• The manual method requires an Outlook desktop installation before syncing to Office 365.

A reliable method to migrate EML into Office 365

We suggest the EML Converter Tool as the best and reliable solution to convert EML files. This tool will make sure that all of your EML emails and attachments are securely imported into your Microsoft 365 account. Additionally, the tool will maintain your entire folder structure, other formatting, and metadata of the emails. If required, you can also convert EML to CSV or a different format or account.

What are the Benefits of the EML Converter Tool?

1. Preview, date filter, remove duplicate emails, and more.
2. Free demo of full features before you buy.
3. It imports EML files to Office 365 and other email clients quickly and easily.
4. It is crazy fast, reliable, and works on all editions of Windows.

How to Professionally Import EML to Office 365?

1. First, install and access the converter tool on your system.
2. Then, click Select File/Folder to add EML files or folders to the software.
3. After that, preview and select the emails to migrate. And click Next.
4. Moving on, change the saving option to Office 365 from the Email Clients dropdown.
5. Here, enter your Office 365 email ID and password to sign in.
6. Finally, apply the required filters or options as desired. Click Convert, and the migration will begin.

Conclusion

Throughout this article, we explored the manual and professional approaches to import EML to Office 365. The free manual approach can be used with smaller volume data, but it can be seen as slower. Additionally, it’s prone to problems with some distorted and missing email content. Therefore, if you don’t want to miss emails or spend time correcting errors, then choose the professional option. Hence, the EML Converter Tool will provide a faster, secure, and organized way to import your EML files. All without worrying about losing any data during migration.

Frequently Asked Questions

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