If you want to combine multiple PST files into a single PST, try Outlook PST Merger software which is the most reliable and beneficial tool to merge single or multiple Outlook PST files into a single PST. With the help of this tool, you can merge both ANSI and UNICODE PST file types and it preserves folder hierarchy and data integrity throughout the merging process. Moreover, this Outlook PST Merger software has a simple user interface that does not require any technical expertise.