Personal Folders (PST) file is the fundamental storage entity in MS Outlook. It contains a repository of user data, including email messages, contacts, tasks, notes, calendar items, To -Do lists, etc. Outlook PST grows in size during the course of day-to-day business communication of the organization. If the PST file exceeds the size limit defined by the MS Outlook version, it becomes very likely to get damaged. There are various other contingencies that lead to corruption of the PST file, such as hardware failures, virus infections, operating system bugs, etc. As a consequence, all the valuable Outlook mail data becomes inaccessible. To effectively work around the issue, you should perform Outlook repair through advanced third-party software.