I am facing an issue while trying to export emails from an old OST file to MSG format. The OST belongs to an old Outlook profile that is no longer connected to the Exchange account, so I can not use the original setup. I tried a few manual methods and some free utilities, but the main problem is that the folder hierarchy gets messed up. Subfolders are not preserved properly, and everything gets exported into a single folder, which makes it difficult to manage the emails. Has anyone successfully exported OST to MSG while keeping the complete folder structure intact?