Suppose you want to search for the best way to convert or recover the OST data to PST and others. I would suggest try, the third-party tool Shoviv OST to PST converter. It gives the best error-free conversion and converts the multiple OST data to Outlook PST, Office 365, Live Exchange Server with any intrusion, and saves OST data to EML, MSG, and HTML formats. It recovers the permanently deleted OST items and restores the inaccessible data. It supports all versions of Outlook and Windows O.S. It provides the free trial version, which can convert the first 50 items per folder.
For more details, visit:- Convert OST to PST