There is lots of online software available to merge multiple Outlook PST files to one single PST but out of them you can trust on SysTools PST Merge software. Why only using this software and what is New about SysTools PST Merge- This software able to synchronize Outlook emails into one PST files quickly- Software has self interactive interface so you can easily merge too many Outlook PST files at a time into one PST- this synchronize Outlook PST files Software effortlessly supports merging of PST Files created using MS Outlook 97 98 2000 2003 and 2007 and easily runs with Windows Operating System Vista XP 2003 2000 and 98. For your easy you can use latest version 2.4 of software which merge multiple Outlook .PST file likes journals calendar to-do contacts information emails with all attachments task etc to one PST. If you merge multiple PST files into one you can comfortably work with Outlook email application. Also information search process will be becomes a quick and easy task as compare to multiple collection of PST files and too many PST files wastage your crucial time nothing else. Firstly you can try DEMO Version for successfully merge 5 Outlook PST files into single PST. After that if you want to merge UNLIMITED Outlook PST files and then give order for full version of software. To purchase full version you will pay a little amount $69 for Personal License and $199 for Business License.