How To Merge Two Outlook PST Files

How can I combine two Outlook PST files? Let you know about the Merge PST software which can merge two Outlook PST files and removes duplicates items during merging process continue. However, merge two Outlook PST files compatible with 2013, 2007, 2010, 2003, 2000 versions with 32 Bit & 64 Bit and runs smoothly with all the Windows OS as well.