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SysInfoTools PST Upgrade & Downgrade tool provides the best platform to upgrade and downgrade your MS Outlook PST files by converting ANSI PST files into the Unicode format and Unicode PST files into ANSI format. The software easily maintains portability across higher and lower versions of MS Outlook. It is smartly designed to increase the capacity of your ANSI PST files of older versions of MS Outlook from 2 GB to 20 GB. The Unicode format of PST files has 20 GB in size and 50 GB in Outlook 2010. This tool upgrades your ANSI PST files into the Unicode format and helps you attain the maximum size limit. By upgrading the PST files, i.e. ANSI PST to Unicode format, you can avoid file corruption caused by oversize issues. It is very useful for administrators to maintain forward and backward compatibility with MS Outlook. By downgrading the PST files, i.e. Unicode PST to ANSI format, you can open them in the older versions of MS Outlook. It supports the conversion of password-protected PST files as well. It provides an "Auto-search" feature that allows you to search your PST files on your system in an auto-mode. Using this software, users can also convert multiple PST files in a single shot. It works in self-describing mode due to its friendly and interactive GUI. There are no prior technical skills needed to use this software. Also, It supports all major versions of MS Outlook (both older as well as newer versions of 32 and 64-bit) like ANSI PST files of Outlook 97, 98, 2000, and 2002, and Unicode PST files of Outlook 2003, 2007, 2010, 2013, 2016 and the latest 2019.