In today’s scenario MS Outlook is commonly used for the email communication for business purpose and it is a really awesome tool designed by Microsoft, but due to some uncertain issue the mailbox in which all the database is stored get corrupted then the user will be required to convert the OST files into PST files and it can be easily done by using an application like ATS OST to PST Converter which has immense capabilities to recover that damaged database, it can work with all the updated version of MS Outlook 97, 98, 2000, 2002, and 2003, up to 2016.

For more Information: https://gallery.technet.microsoft.com/office/free-OST-to-PST-Converter-3d1090d3