GainTools Merge PST Tool is an excellent solution for consolidating several Outlook PST files into a single file. The program can combine mailbox data like emails, contacts, schedules and other messages while keeping the data's structure and details. It automatically eliminates duplicates, guaranteeing that your file remains organized and neat. It is compatible with all versions of Windows and Outlook and can read PST files in both ANSI and Unicode formats. To get the most accurate results, users can join whole PST files or just pick out certain folders. Its basic user design makes it easy for people who aren't tech-savvy to use. Prior to buying the system, you can try it out for free.