If you feel to upgrade your PST format then SysTools a world leader company launched PST Upgrade tool for converting Outlook 2000/2002 to Outlook 2003/2007.Outlook PST Upgrade tool is a perfect PST convert utility to convert Unicode PST file into ANSI PST file. Convert your Unicode PST file to ANSI PST & open it even PST file shows error "Properties for this information service must be defined prior to use". For every conversion, PST Upgrade creates a new PST that is a replica, folder by folder, of an existing one. It makes no changes to the original PST file. Outlook PST Tool just Convert Ansi PST to Unicode PST file & creates a new PST file. Software can be used as both Outlook PST Degrade tool & Outlook PST Format upgrade tool. PST Degrade Tool software allow users to upgrade ANSI PST to Unicode PST and degrade Unicode PST to ANSI PST. Outlook PST Upgrade software supports to converts all the mail folders like Inbox, Outbox, Sent Items, Drafts, Deleted Items, Contacts of ANSI PST File to UNICODE PST file. Software requires a valid configured profile of MS Outlook 2003 & 2007 must installed. SysTools Outlook PST upgrade tool successfully runs with Windows Windows XP/2000/2003/Vista & Windows7 Operating System. You can use Demo version of this software which is free of cost if you fell satisfaction then you purchase full license of this software. Our support team is 24*7 hours ready to solve your problem or any technical issues.