User can easily import their EML files to Office 365 by using Outlook. Open your EML file in Outlook, then connect your Outlook account with the Office 365. It can be a lengthy process so there are chances that you may face some issues. Therefore, it is better to use Corbet EML Converter software to import your data. For more information, follow this article: https://corbettsoftware.com/blog/import-eml-files-to-outlook/