This is the software publisher’s description.

SynchPst for Outlook is an easy way to synchronise data between personal folders. Choose either single or multiple folders, with or without subfolders, and synchronize them quickly and efficiently.

Don't go through the elaborate process of copying and replacing your PST files - synchronize them intelligently.

If the selected folder does not exist in the target pst file the entire folder is copied, otherwise the source and target files are compared and the entries are synchronized based on creation time and/or subject.

Do you travel and sometimes receive email to your laptop as well as your desktop? Synchronize your info with SynchPst for Outlook and you will always be up to date.

Do you want to merge your info from several archived PST files to a single PST file? It's easy with SynchPst.

Note that the latest version now supports Outlook 2007.