KDETools Merge Outlook PST Tool can be used to successfully combine PST file into a readable PST file. The software allows users to merge PST files in multiple ways. Users are trial versions to merge data by selecting any of the given options. This utility merges various MS outlook contacts, outlook emails, and outlook calendars into one PST file with great ease.
There are lots of software provide in the web. But before you use full version, go through the demo version to check software’s ability.
Try this Softaken Merge PST Tool