If you are looking for a solution to export Office 365 emails to EML files then my recommendation is to try out the
eSoftTools Office365 Backup Software. This software is very useful for exporting mail folders from Office365 accounts. Users can easily download Office365 emails in EML, and other available formats like- EMLX, MSG, HTML, MHTML, MBOX, and more. Download this software to download Office365 to your local drive and perform this backup process with complete safety.
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Export Office 365 emails to EML files