I would recommend you to try the tool which is recommended by Microsoft professionals and administrators. To
merge PST file it's important that the tool has some good features like:
1. Can easily
merge multiple PST file with a single go
2. It has a
user-friendly and easy interface to work
3.
Free demo version is available whenever you are thinking to try the tool
4. Works with
100% integrity without giving any error
5.
Combines PST files with all or specific Emails, Contacts, Notes, Calendars, To-Do & Task folders
6.
Supports all the version of Outlook and Windows
7. Always
saves in new or existing PST, Outlook profile, Office 365, & Exchange server