The damaged or corrupt OST files do not synchronize with Exchange Server and hence could not be evenly accessed. Thus, to open OST in Outlook it becomes important to take assistance from a reliable third-party tool like RecoveryFix for OST to PST. The third-party tools are designed to fix OST-based error swiftly so that the content can be accessed as soon as possible. Once recovery is done, user can view contents using ‘Preview’ feature.