If you want to perform a safe migration from Lotus Notes to Office 365 then the users can go with Shoviv Lotus Notes to Office 365 Software. This software not only migrates Lotus Notes to Office 365 but also exports into Live Exchange Server, Outlook, EML, MSG. This software supports all versions of Lotus Notes, MS Outlook, and Windows Operating System. Shoviv Lotus Notes to Office 365 also has a free trial version and a good technical support team.
Get more information:- https://www.shoviv.com/lotus-notes-to-office365.html
 

You can use the Email converter tool for converting email files into other email files format but before using any tool you should know the complete knowledge about why we need conversion of email files? Here I share article link:  Manual conversion of Email files  from where you will learn all the details about popular email files and the best conversion methods for OST to PST, EDB to PST, NSF to PST, OLM to PST, MBOX to PST, EML to PST, DBX to PST, DXL to PST and PST to EML files format.