PST files are primarily intended to create backup copies of Outlook folders and their secondary elements, including Exchange accounts. On the other hand, OST files are used if an Exchange account is available and you need to work with the files offline or with a predetermined RSS feed. This second format is especially useful for accounts configured with Outlook Connector.
Stellar Phoenix OST to PST Converter is particularly useful for scanning databases and repairing corrupt files. You can preview any recovered message or data and even select individual emails or save them on your computer as EML and MSG files.
The application also includes the option to delete logs, helping you keep data private even if the computer is used by other people in your household.
The demo version doesn't let you save the emails in the desired conversion format.