When single user or organization changing the email clients Thunderbird to Outlook, they need to convert the MBOX file into PST, so m MBOX file data will become accessible in Outlook.
Shoviv MBOX to PST converter is the tool helps the users to convert the file format MBOX to PST. https://www.shoviv.com/blog/export-emails-from-thunderbird-to-outlook-2016-2019/