SysInfoTools PST Compress and Compact is a powerful innovative tool, which is designed to compress large PST files of MS Outlook without hampering the integrity of data. Using PST Compress and Compact software, users can easily compress or shrink single or multiple Outlook PST archives created irrespective of using any version of MS Outlook. SysInfoTools provides a simple user interface and it's works flawlessly for password protected PST files.