There are many ways to combine Archive PST files into a single PST file format. One way is to use software to merge Outlook PST files. However, there are some users who prefer to consolidate PST into a single PST database without using Outlook. Then, to quickly combine multiple files into one, I would suggest using
ToolsBaer Merge PST Tool. This software can easily combine your multiple archives PST files into one PST file without losing any data.
An advanced ability to merge in similar or different folders, in addition to a single user interface that can easily accomplish combining with full accuracy, is a unique choice to choose PST files or folders. You may effortlessly combine several PST files with this time-saving software, which facilitates easy management of PST files by combining them into one.
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https://www.toolsbaer.com/pst-merge/