Converter Tools provides the most efficient tool for converting the OST file to a PST file. OST to PST Converter is an emerging tool that converts OST files into PST file formats, including emails, calendars, tasks, notes, and journals. It offers to change OST files into PDF and other various file formats. The OST Converter Software migrates OST files into Office 365 and other cloud or web-based email clients such as Gmail, Yahoo, IMAP Server, Thunderbird, Hotmail, etc. It is compatible with all Windows versions, including Windows 11.

https://www.convertertools.org/ost-to-pst/