What tool or method works best for converting MBOX to MSG format?

[Client Thomaswilson081]

I am currently working on migrating several old email archives that are stored in MBOX format (exported from Thunderbird). My organization has now moved to Microsoft Outlook, and I need to convert these MBOX files into MSG format so that individual emails can be opened and managed directly in Outlook. The problem is that some of these MBOX files are quite large and contain important attachments, email metadata, and folder structure that I can not afford to lose during the conversion process. I have tried a few manual methods I found online, but they seem complicated, time-consuming, and not very reliable for bulk conversion.