Users can try Shoviv Exchange OST Recovery Software is a very efficient tool to access inaccessible and corrupted OST files. It can handle multiple OST files at a time and completes the task without losing a single piece of original data. It securely recovers OST files and converts them to PST as well as EML, HTML, MSG, vCal and vCard formats. The tool perfectly retains the originality of the data and doesn’t make any alterations. A free trial version of the tool is available without investing in it.

Read more: https://www.shoviv.com/blog/repair-corrupted-ost-file/

Using the rapid and reliable WholeClear MBOX to PST Converter Tool. It's the best way to convert MBOX files to PST format. Without losing any data, it is simple to move MBOX data files to PST. All email clients that support mbox, including Thunderbird, Apple Mail, Eudora, PocoMail, OperaMail, Entourage, SeaMonkey, and others, can utilize it. All Windows and Microsoft Outlook versions work with it. Without any limitations, you're able to immediately convert both one or more mbox files to PST.

Steps to Convert MBOX To PST files -

Run the program that you downloaded on your computer.
Add several MBOX documents you wish to convert.
Scan chosen MBOX files and display previews of them among the available export choices, pick PST.
To begin the conversion process, click the Convert Now tab.

Read More - https://www.wholeclear.com/mbox/pst/