SysTools PST Merge can merge multiple PST files together into a single large Unicode type Outlook PST file.
It supports batch processing and it can even remove duplicate items while merging many PST files and folders together with all items: emails, contacts, calendars, tasks.
v3.2 [Jan 14, 2015]
May include unspecified updates, enhancements, or bug fixes.
Create, extend shrink, resize, move, delete, merge, & hide hard disk partitions
