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Strategies to Import EML to Office 365 Environment Easily

Published By Deepa Pandey
Anuraag Singh
Approved By Anuraag Singh
Published On October 30th, 2023
Reading Time 6 Minutes Reading
Category Office 365

Import EML to Office 365 or Outlook 365 in A Few Steps

Originally conjured up by the brains behind ARPANET as an email-storing file format, EML quickly became an industry favorite. Proven by the fact that it was adopted and accepted by other third-party email clients as well. However, after decades of being one of the top dogs in email storage, it is now way behind its competitors. Moreover, in the modern workplace, there is no place for such a vulnerable and error-prone file format, so it is not surprising that many users wish to import EML to Office 365 or other alternatives. As Office 365 uses its own proprietary PST files, a direct transfer is not possible. Needless to say, we cover some of the most commonly used strategies and explain them so that even technically insufficient users can open their EML files. Let’s first start with reasons to move on from the EML format.

Scenarios in Where Importing EML to Office 365 Becomes Mandatory

“I have been a Windows user through and through; however, since the discontinuation of Windows Live Mail back in 2017, I have been stuck with some EML files. I tried many alternatives, like Thunderbird, MailBird, etc., but none of them offered what Microsoft 365 could. So I purchased a subscription now, I need to move the remaining Email files. ”

This is the case for many individuals out there. Although EML is a universally accepted format, the lack of functionality of email clients pushes people towards Office 365.

Also Read: Complete SharePoint Online Migration Checklist for Shifting Data

“During a recent merger, our organization welcomed a ton of new faces. During the final proceedings, we found that they still used the default EML files for conducting email communication. Now as the IT admin, I have to bring in those files to the Office 365 environment. Is there an easy way to speed up the process” 

Mergers are a bittersweet moment, and one way to deal with your newfound difficulty is to directly hop on the automated solution provided ahead.

“After the recent changes to the compliance structure, our organization no longer allows us to keep private EML files. Now I have to shift and import all these EML files to the Office 365 ecosystem. Can we make the task more efficient as the manual method is too complicated?”

The feature of EML files to keep all data separate quickly becomes the greatest problem during migration scenarios. However, keep all concerns aside and forget about the manual method, as the professional solution is here.

Here we covered various scenarios demanding EML file movement, including personal storage, company mergers, legal mandates, etc. In all different cases, the best solution is none other than the automated utility, so let’s see why.

How to open EML files in Office 365 in an Automated Manner

When experts want to import EML to Office 365, they trust the one and only SysTools EML to Office 365 import tool. The generic design of the tool contains state-of-the-art algorithms for quick and efficient data transfer. In the entire market for such utilities, no one else offers the quality service that matches the tool provided here. In all criteria, be it UI, feature set, price, or customer support, it shines above the rest.

Download Now Purchase Now

Get a copy and follow these steps to bring all EML files to the Office 365 environment.

  • Step 1. Launch and load the software on your machine, then select File System as the Source and Office 365 as the Destination.

    Open Tool to Import EML to Office 365

  • Step 2. Scroll to the bottom till you reach Workload Selection and mark the box next to Emails; if required, apply the Date Filter as well.
    Select Workload
  • Step 3. Next, on the Source page, perform the Validation task after selecting your original file location.
    Validate Source
  • Step 4. Similarly, on the destination page, add your Admin Credentials and validate them.
    Validate Destination
  • Step 5. Choose a mapping option from Fetch, Import, and Download.
    Choose Mapping
  • Step 6. At last, when user selection and validation are done, click on Start Import.
    Start Import

Drag and Drop Technique

  • Purchase, download, and launch the Microsoft Outlook email client.
  • Visit the folder that houses the EML files and open it
  • Pick an EML file, keep pressing the primary on your cursor then drag & drop files into the inbox folder of the Outlook app
  • Repeat the same steps for all EML files; otherwise, using Ctrl + A, select all at once and drop them in the same manner
  • EML files can now be opened and viewed in Outlook. 

Other methods, like using Windows Live Mail or Outlook Express, are no longer valid.

The absence of a direct method to import eml to Office 365 forces users to use this as an alternative. As EML files themselves are fundamentally different than PST files, this drag and drop can cause some issues, which are discussed ahead 

Limitation of Manual Method

  • Some attachments may stop working.
  • There is a risk of crashing the Outlook app itself if too many EML files are put there at once. 
  • If the user moves the same data more than once, it can overwrite and cause data loss.


As we conclude the topic of how to import EML to Office 365, we hope users have a clear idea of how to proceed with the task. Here, we gave the manual methods and explained the reason for not using them. As an alternative, we provide an automated utility that helps to open EML files in Office 365 easily.  With this tool, complexity takes a back seat as it’s a user-friendly solution and requires no specialized technical expertise.


Q1. I have a large quantity of EML files that I want to move to Office 365. How can I achieve this task?

Ans-Download the utility and follow the steps outlined in the article. You will find all EML files in the Office 365 environment sooner than you realize.

Q2. Are my EML files expired? I had a lot of important information there. What should I do now?

Ans-File formats cannot expire, but they can get corrupt. Therefore, you should move your files to a more robust place like Office 365, and the tool here is the best way to do this.

Q3. I can view all my EML files in Thunderbird; why should I move those files anyway?

Ans-Thunderbird is without question an excellent service, especially one that is free of charge. Moreover, the main cause of concern is that it is a volunteer-led project that can shut down without notice. Office 365, on the other hand, is part of a multibillion-dollar firm that shows no signs of stopping. Not to mention the other advantages, like seamless connectivity with apps like Teams, OneDrive, etc.

Q4. Will I experience any data loss if I import EML files to Office 365?

Ans-Absolutely not! The tool guarantees complete data security, which manual methods can’t match. So this is another reason to choose the expert-recommended tool.

Q5. Are EML files obsolete? What does the future hold for a file format with such a rich legacy?

Ans-EML files are not going anywhere. Well, as long as people don’t stop sending emails. However, we cannot ignore the fact that there are better alternatives to EML file formats, with PST being one of them. Technology is constantly evolving, and if EML files their end of life, something better will replace them.

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