If anyone looking for the best solution to convert EML to Office 365 then I would like to suggest you try Mails Daddy EML to Office 365 Migration Tool . It supports all EML and EMLX based email clients data such as Window live mail, Thunderbird, Apple Mail, etc. Here users can transfer multiple & large EML files into Exchange Online & Outlook PST format. This amazing tool provides a filter facility, using this user can perform selective data conversion from EML to Office 365. Know More: https://www.mailsdaddy.com/eml-to-office-365-migration-tool/