Short description of Kernel OST to PST Conversion Software 7.05.01: Kernel OST Conversion is a OST to PST conversion software recovering other components such as emails, contacts, tasks, notes and journals etc. Software uses more faster conversion algorithm to convert the inaccessible Microsoft Exchange Offline Storage (.OST) file to a usable Personal Storage (.PST) file that can be easily read by any other email client such as Microsoft Outlook.