I have a large number of MBOX files exported from different email clients like Thunderbird and Apple Mail. Now I want to convert all of them into a single or multiple PST files so I can import them into Microsoft Outlook. Doing it one by one would take a lot of time. Is there any reliable method or tool that can convert multiple MBOX files to PST in batch mode? I am looking for a solution that ensures no data loss, maintains folder structure, and ideally supports bulk processing.