How to Fix the EML Not Opening in Office 365 Issue?

Why can’t Office 365 open EML? Common Reasons

• Firstly, Office 365 does not support EML format directly, due to which you can just view the HTML, attachments, images, links, etc, but not the original EML structure. Office 365 only directly imports PST and MSG, not EML.
• As EML files are sourced from different email clients like Zoho, Thunderbird, Apple Mail, etc, the variation breaks, and Office 365 is unable to open EML.
• A major reason the EML not opening in Office 365 can be the security policies. These policies often block the EML files because they contain malicious headers, suspicious headers, HTML indicators, etc.
• Also, if the header content is damaged, Office 365 refuses to load and open it.
• So, there can be n number of reasons why Office 365 not accepting EML file uploads. So, let’s see further that how we can fix these issues and open our EML files in Office 365.

How to Fix the EML Not Opening in Office 365 Issue? Quick Answer

As we know that there is no direct way to open EMLs into Microsoft 365, so there are two ways through which you can open and view your EMLs in it. First, you can open your EML via Outlook and Thunderbird email clients by dragging & dropping or syncing the Office 365 account in it and then exporting the files. Otherwise, if you don’t have such email clients and want a bulk & safer process, you can use the professional EML converter, the best alternative if you don’t want to follow the long steps. But let’s discuss both the manual and automated approaches below to get a clear picture.

Manual Approach

You can attempt various manual methods. We will be discussing how to fix the EML not opening in Office 365 Issue manually by simply syncing the Office 365 account in Outlook or Thunderbird and then opening it.

Manual Method 1: Using Outlook’s Drag & Drop Method

1. Open Outlook and go to File> Info and click on Add Account to open your Office 365 account in Outlook.
2. Then it will start syncing all the data of that account automatically and display it in the left panel on the main page.
3. Now, start dragging and dropping your desired EML files into your required folder one by one.
4.  Lastly, your dropped files will be synced in your Office 365 account.

Note: This method is paid as Outlook is a subscription-based application. But even with a subscription, you cannot migrate your EML files in Office 365 in bulk with data security and maintain the original hierarchy. It is a risky process and may corrupt the large files, so it should be used at your own risk.

Manual Method 2:  Using Thunderbird’s add-on

1. The same way we proceeded in Outlook, we have to open Thunderbird and go to Tools> Account Settings> New Account> add your mail account details to sync it.
   
2. Then, it will start syncing automatically. The only difference in this method is that via an add-on, you will be able to open your files in bulk.
3. Go to add-ons and themes in the settings gear (bottom-left corner) and search for ImportExportTools NG add-on and install it.
4. Now, go to the main page, select your desired folder or create one, and right-click on it.
5. Then choose the ImportExportTools NG option > import EML messages > all messages from directory and subdirectories.
6. Now, from there, you can select your EMLs, and it will sync in that Office 365 account.

Note: You would be thinking that how to fix the EML not opening in Office 365 Issue is solved via this method, but as it converts in bulk but it does not guarantee data security and often disturbs the original hierarchy and formatting of the files.

Drawbacks of Using the Manual Method

• The manual method does not support bulk conversion. And if it does, they are not safe to use for your crucial data files, as it may lead to corruption and errors.
• The manual ways do not preserve the original data structure and folder hierarchy when opening EMLs.
• You cannot view and open thousands of EML files altogether from multiple users and email clients using this tool.
• High risk of errors, losing data elements, attachments, headers, losing HTML content, etc.
• Contains long steps that can be difficult to use for a non-technical user.
• It requires multiple applications to be installed.

Best Solution to Open EML in Office 365

Instead of using such difficult applications just to open your EMLs in Office 365, you can simply use the 4n6 EML converter tool. It is a much better alternative if you have large EML files to view. EML not opening in Office 365 issues can be solved via this software. It provides data security, can open thousands of files together, maintains hierarchy, and many more. Let’s discover the free & best EML file viewer’s working steps.

1. Download the tool and run it.
2. Go to Open > Choose files/folders, and it will display the files.
3. The EMLs will be displayed in the left panel in the exact original hierarchy, and you can view the files in different modes.
4. Then you simply have to hit the export button and select the Office 365 option.
5. You will see Office 365 export options, select your desired options, and click on the save button.

Why Use an Automated Tool? Prime Features

• Using this tool, you can open your files in bulk without size restrictions. You can open thousands of files altogether without any errors.
• The EML not opening in Office 365 issue will be solved using this application, as it has the ability to transfer EML into Office 365 directly in bulk.
• The files will be opened in the same original hierarchy and data structure without any edits or changes.
• This tool guarantees safe conversion and does not save the data files and their information on its server, and keeps the original files intact.
• You just have to follow 5 5-step guide which will make your work easy and effective. It supports all kinds of EML files sourced from any email client.
• It comes with an easy-to-use interface, which is helpful for non-technical users.

Which one to prefer and when?

If you are an individual with just a few EML files and are looking to fix the EML not opening in Office 365 issue, then you can go for the manual method, as it is the best one for you.

But if you are a professional and have a large number of EML files from multiple email clients the you should opt for the automated solution as it will open your files in bulk without any data loss and changes. Instead of subscribing to Outlook and not getting seamless conversion, the smartest way is to invest in something which useful and worth it.

Conclusion

In this article, we learned how to fix the EML not opening in Office 365 issue using manual and automated approaches. Both ways are effective; it just depends on what purpose you are opening your EML files for. This blog solved the question of many users about why Office 365 does not accept EML file uploads and various ways to make it accept.