Outlook files in PST formats across versions could be merged into one PST file.
Free PST Merger lets you merge multiple PST files into a single file. PST files that contain personal folders data can be merged, you could move content from multiple sources. The merging can be done into a particular PST file or a new destination file could be created. Any user with multiple PST file scattered around in his system will find it difficult to manage his mail system. Merging provides a simple way to have the control back and manage your older mails the way you want. All it takes is just a few clicks. The interface is very simple and intuitive. Most users will find it simple to get going with the tool. There is no need for any specific IT skills to do that. The Pro version gives you the capability to combine more than two files at a time.
Merging any items from the folders such as Inboxes, Calendars, Contacts, Journals, and Tasks etc. to another PST file is easily done. You can specify the location of the file to be created. The process is error free; you need not worry about introducing errors into your mail messages when merged. Data integrity is preserved. PST Merger option “Move content from several files to selected file” allows you to transfer the content from selected folders to a specified PST file and remove the transferred folders from the old source PST. If you do a copy, the original data remains in the source files. This is a good tool and can be very handy.