If your MSG files are arranged in multiple folders and subfolders, and you want the same structure in Outlook, you need a structured conversion process. To convert MSG to PST with folder hierarchy preserved, use the “Add Folder” option in a tool like the SysInfo MSG Converter Tool. This allows the software to read all subfolders automatically. Choose PST as the output format and proceed with the conversion. The tool ensures that parent folders and subfolders remain unchanged in the final PST file, so you don’t have to reorganize emails manually later.
Read more: https://www.sysinfotools.com/msg-converter.php