Many Users want to upgrade their Microsoft Outlook due to its latest feature like upgrade size limit and many more because they don't want to miss out on any latest feature of the upgraded Microsoft Outlook. Due to this they want to switch to a higher version of Microsoft Outlook and need to upgrade their PST size limit. SysTools Software ANSI to Unicode conversion facilitates you the more convenient way to upgrade lowest version of Outlook (2000, 2002 and XP) to latest version of Outlook (2003 and 2007) in an expeditious way. SysTools PST Upgrade utility upgrade all email metadata information intact (to, cc, bcc, from sent & received date/time, attachments etc). This utility is also able to degrade you PST file format. If you think that there is no need to degrade your Microsoft Outlook environment so, you are the wrong. Bear in mind that if you have a lowest version of Microsoft Outlook at home and the latest version of Microsoft Outlook in office, then you need to degrade your Unicode format. You should know that Microsoft does not support backward version which means, upper version files cannot open in lower version. The negative point of this utility is that, this is unable to upgrade oversized PST file due to corruption. Try demo version of this utility to test their ability and accuracy which is extremely free but with limited features (demo version of this tool will allow users to convert only first 10 items from all mail folders). Before purchasing it, evaluate the software and get full version to upgrade your all PST file at reasonable cost just $49.