I have used Shoviv Lotus Notes to Office 365 Migration Tool to migrate my Lotus Notes mailboxes into Office 365 file format and this tool has done this job tremendously and without any alteration in the original data. This tool has a simple interface and a secure environment for conversion. Comes with so many different features so that a novice can also use this tool without any hassle. Users can try its free trial version for the first 50 items per folder before investing in it.
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