A Complete Guide to Import EML to Outlook 365 Account?

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  • Updated on October 16th, 2025

Summary: Want to secure your EML file data on a centralized cloud-based platform & stuck on how to migrate? Therefore, the best solution is to import EML to Outlook 365 Account. Here in this blog, we will learn the best techniques to do this migration. Alongside, this blog will cover all the reasons, tips, and any required prerequisites.  Plus, we will guide you to select the best ways to migrate EML files, either via a manual approach or a reliable EML Converter Tool for this migration.

I need to migrate a large archive (over 10GB) of EML files into a specific folder in my Outlook 365 mailbox. The built-in ‘Open’ function in Outlook is too slow for this volume. What are the recommended methods or reliable third-party tools to batch import EML files directly into my Outlook 365 profile while preserving the original folder structure and metadata?

–Fabio Shao, Compliance Officer

Simple Steps to Import EML to Outlook 365

  1. Load EML files into the CloudXena EML Converter Tool.
  2. Then, select Office 365 as the output format.
  3. After that, sign in to your Microsoft 365 account.
  4. Thereafter, apply filters if needed (date, attachments).
  5. Lastly, click Convert to start the migration.

Why Import EML Files into Outlook 365?

This is very practical for many businesses to shift from locally stored data to a more useful cloud-based platform. Because it becomes very tough to check data from a local store, and it is a very impractical approach. Along with that, there are many other reasons to import EML to Microsoft 365.

  • You can manage all emails in one unified, cloud-based platform instead of scattered local files.
  • Moreover, it will protect emails with cloud storage, automatic backups, and enterprise-grade security features.
  • Additionally, integrating with Microsoft 365 tools like Teams and OneDrive for easy sharing and teamwork.
  • Plus, users can use powerful search, folders, and rules to manage large email archives efficiently.
  • Furthermore, you can migrate emails from outdated systems to a modern, supported, and accessible platform.

How to Import EML to Outlook 365?

You can migrate your EML data file to Microsoft Outlook 356 very easily. Choose the best fit methods for you from below. But before that, we will complete a checklist for the smooth migration

Checklist for Importing EML to Office 365

It is a best practice to complete this checklist before you import EML files in Office 365. This will prevent common pitfalls like data loss, errors, etc.

  • ☐ Locate all EML files and folders
  • ☐ Check total data size and email count
  • ☐ Back up the original EML files
  • ☐ Ensure a stable internet connection
  • ☐ Moreover, have Office 365 login credentials ready
  • ☐ Choose your migration method (Manual or Proven Solution)

1. Free Way to Import EML to Microsoft 365 (Outlook Desktop App)

In this method, we will use the Outlook (Desktop Version) for this migration. Here is the detailed step-by-step guide for this

  1. Firstly, Open Outlook (desktop version).
  2. After that, go to File → Account Settings → Add Account.
  3. Enter your Microsoft 365 email address and sign in using your credentials.
  4. Now, open Windows File Explorer.
  5. Thereafter, navigate to the folder where your .eml files are saved.
  6. Select the EML files you want to import (you can use Ctrl+A to select all).
  7. Drag and drop the selected files into your desired folder in Outlook
  8. Once imported, Outlook will automatically sync the emails with your Microsoft 365 mailbox.

The emails will be available across all devices connected to your account. Now, you have imported your EML files to Outlook 365 easily, but it comes with a few challenges.

Drawbacks of Manual EML Import Via Outlook Desktop

  • It is very time-consuming for bulk imports.
  • On top of that, this comes with a size limit for each file.
  • Moreover, with this method is not important to preserve the folder structure.
  • There might be a risk of data loss or missed files.
  • Plus, it requires the Outlook Desktop App to be installed on your system.
  • Alongside, it is not scalable for organizations as it requires migrating one by one.

2. Well-Tested Way to Import EML to Outlook 365

This is the best approach for EMl file migration for businesses with big data. Because this professional CloudXena EML Converter Tool is designed to deal with the larger EML files. Plus, its advanced features & intuitive interface make it best for importing EML to Office 365 in bulk. On top of that, this software can convert EML to MSG and many other file formats.

Detailed Steps to Import EML files into Outlook 365

  1. Run the EML Converter Tool as an administrator.
  2. Step-1

  3. Then, select and add your EML files/folders.
  4. Step-2

  5. After that, preview the emails and click Next
  6. Step-3

  7. Now, choose Office 365 as the destination.
  8. Thereafter, enter your credentials and adjust settings if needed.
  9. Step-5

  10. Lastly, click Convert to start the migration.
  11. Step-6

With this, you have imported all EML data easily with this software. This software ensures data integrity while maintaining the conversion with keeping metadata intact. You can also EML File to PDF with multiple email clients.

Criteria Manual Method (Drag & Drop) CLOUDXENA EML Converter
Bulk Import Support Single users only Unlimited users & mailboxes
Folder Structure Preservation High data loss risk Zero data loss guarantee.
Attachment Handling Days/weeks per user Bulk migration easily
Speed & Efficiency No reporting Detailed audit reports
Error Handling & Logs High maintenance Hands-off automation
Outlook 365 Compatibility Requires desktop Outlook setup Direct integration with M365
Suitable for Large Volumes Not scalable Ideal for enterprise use
Security & Compliance Risk of data mishandling Supports MFA & secure login

Key Takeaways

This blog guides you with all the required details to import EML to Outlook 365. Here, we have discussed the manual approach suitable for individual users. However, the professional method is best for bulk EML file conversion. Alongside, we have provided the best way to choose the right approach for you.

Frequently Asked Questions

Q1. How to Import EML to Office 365?

Ans. You can smoothly import EML to Office 365 with CloudXena EML converter. You simply load your EML files into the EML Converter Tool &  select Office 365 as the output format, and sign in to your Microsoft 365 account. Apply any necessary filters like date range or attachments, then click Convert to migrate your emails.

Q2. Can I import large files from EML to Outlook 365?

Ans. Yes, the EML Converter Tool gives you the flexibility to import any size of EML file to Outlook 365. 

About The Author:

Milan Kumar Vishvas is a seasoned content writer with expertise in creating SEO-friendly, engaging, and insightful content across industries, including IT, SaaS, and finance. With years of experience in copywriting, recruitment, and digital branding, Milan specializes in simplifying complex concepts into clear, impactful narratives that connect with readers. When not writing or strategizing, he is passionate about exploring new trends in technology, digital marketing, and workplace culture. Milan firmly believes in the power of words to inform, inspire, and transform businesses.

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