If you want to migrate the MBOX file into Microsoft Office 365 Mailbox, then I suggest going with Shoviv MBOX to Office 365 migration tool.
Read more: https://www.shoviv.com/blog/how-to-import-mbox-to-office-365/
To email Export From Thunderbird to Outlook professionally, Shoviv MBOX Converter is a prominent solution that works proficiently and fluently with assurances and provides various user-centric features. This converter assuredly exports numerous Thunderbird emails along with the item's properties without any changes.
Page: https://www.shoviv.com/mbox-converter.html
https://www.shoviv.com/how-to/export-mbox-to-pst-manually.php
https://www.shoviv.com/blog/how-to-import-mbox-to-outlook/
https://www.shoviv.com/blog/export-emails-from-thunderbird-to-outlook-2016-2019/
https://www.shoviv.com/blog/migrate-thunderbird-to-office-365/
https://www.shoviv.com/blog/how-to-import-mbox-to-office-365/
If you want to migrate the MBOX file into Microsoft Office 365 Mailbox, then I suggest going with Shoviv MBOX to Office 365 migration tool.
Read more: https://www.shoviv.com/blog/how-to-import-mbox-to-office-365/
I suggest trying the Shoviv NSF to PST Converter tool.
Read more: Convert Lotus Notes to Outlook
I refer Shoviv EML Converter tool for Exporting single or multiple EML files into various file formats such as PST and MSG. Go with a free trial version of this tool evaluate it and then get a full version.
visit here: https://www.shoviv.com/eml-converter.html
If you are looking to backup your emails from Outlook or any other IMAP Email client then, I suggest the Shoviv IMAP Backup tool for seamless backup in various file formats such as PST, EML, MBOX, MSG, etc.
To Convert MBOX to PST file, the Shoviv MBOX to PST Converter tool is the best software. This tool supports 20+ email clients for MBOX file format.
Read more: Export Thunderbird to Outlook PST File