I would like to suggest you use this most effective SysInspire EDB to PST free software that has the ability to recover all the deleted Exchange database in a few mouse clicks. It export Exchange database to PST and also comes with a splitting feature to shorten any big sized PST file into multiple small PST files. And if don't want to purchase this tool you can go with its demo version and after getting satisfied with its functioning you can jump to its paid version.
For More Info:- Exchange Server Recovery