Convert ANSI PST to Unicode PST

There is no automatic way to convert a Microsoft Outlook ANSI PST to a Unicode PST. Microsoft Outlook PST file supports Unicode and ANSI both files and then import items from the old data file to the new Microsoft Outlook Personal Folders PST.
1. Create a new data file.
2. Import items to the new data file.
Another way to Upgrade PST with the help of SysInfo PST Upgrade Tool. I can refer a link which can help you to upgrade your PST files:- http://migrateemails.com/2016/09/29/upgrade-outlook-from-older-to-newer-convert-ansi-pst-to-unicode/

PST Upgrade is the advanced windows utility that effectively upgrade Outlook email client from old to new and new to old version. The utility quickly convert ANSI to Unicode and Unicode to ANSI in a safe mode without alteration on the original PST files. The software also allowed to add new PST files to Outlook profile directly. Visit here:- http://www.osttopstapp.com/ansi-to-unicode-pst.html