Outlook lacks a built-in merging PST file feature. Softaken Merge PST Outlook Software is a third-party tool that you will need to merge several PST files into one. This utility enables you to quickly consolidate multiple PST files into a single file without losing any data. It facilitates the effective merging of big files and maintains the folder structure. Working with password-protected PST files and enabling you to select which folders to merge, such as emails, contacts, or calendars, it also lets you. Like any other data file, you can open the resulting PST file in Outlook following the merger. Anyone who needs to securely combine several Outlook PST files will find this easy solution. This utility supports all Windows versions like Windows 11, 10, 8.1 , 8, 7, XP & Vista, etc. This program can work without an MS Outlook installation.