OST and PST are two database files of Microsoft Outlook as you know know you can not directly open OST files into Outlook 2016 or any version until or unless convert them into PST format. In this situation, You can try most reliable and effective ZOOK
OST to PST Converter software. It is dedicated tool to convert complete mailbox data of OST files to PST file format so that users can easily access or open in versions of Outlook. It is fully supportable to Microsoft Outlook 2021, 2019, 2016 and all below versions. Users can smoothly run this program on any Windows supported platform.