Merge PST Files in Outlook - Version 3.0 Merge PST files is now possible to accomplish by SysTools PST merge software. You can merge PST files in Outlook by this tool. You just have to browse the PST files which you want to merge. How to merge PST files in Outlook? For such question get the only well-suited solution. You can merge multiple PST files together.The best thing about this software is that it removes duplicates by just a simple click. So that when someone attempt to merge PST files together then you don't have to remove each duplicate manually. This program can completely merge multiple PST files together into single PST file. This is the only way by which one can merge PST files in Outlook in bulk.There is a demo which has limited features and this software comes with many more features in which one can merge PST files in Outlook on a greater scale. You can merge multiple PST files in bulk by giving a payment of $69 for personal key and $199 for business