ArchivER for Outlook 2003+ is an Outlook® 2003+ add-in utility that is used to archive Outlook® Folder data to individual files in common file formats instead of an archive PST file.
Why do this? How long will Microsoft support the PST format? Will it be years? Who knows? What this utility will do it to extract the items from your Outlook® folders and store them in the common formats (Rich Text, Text, etc,) in the same hierarchy/Folder structure and with the date/time the item was received or created. This does not guarantee that the information will be viewable in the future, but it makes it more likely by using common file formats.