It is very easy to open OST file emails in another Outlook profile by converting the OST file data into PST file format because Outlook allows opening PST files. I would suggest using Pcinfotools OST to PST Converter to PST Converter. This OST to PST Converter can easily convert the OST file to the PST file format. It supports bulk conversion so users can convert multiple OST files at once, which saves time and effort. It is compatible with all versions of Windows and Outlook editions. It has a user-friendly interface, which makes it easy to use, even for novice users.