To convert EML to Office 365 file, use this eSoftTools EML Converter tool, which was advised to me by one of my professional colleagues. The tool moves all email items, including email, instantly and effortlessly. Download the free trial version of this program to transfer the first 25 items from each eml folder to pst or others files formats and it also gives a preview option before the conversion process. The most advanced and old editions of Microsoft Outlook are compatible with this software.
Read more:- EML to Office 365 Converter
