If you've used Achab's Archive Server (ASM) software in the past and upgraded to MailStore, it's highly likely you'll be wanting to bring across that historic archived data to the new platform. There are two ways you can go about importing an external ASM archive to MailStore - either directly as files, or, via your MDaemon email server. One of the limitations of importing directly into MailStore is that mail can't be sorted on a per-user basis and instead the archive will have to reside under a single MailStore user account which you delegate access to via MailStore's permissions system. It's for this reason that we tend to recommend the second option and utilise the MDaemon server as an intermediary for MailStore to collect the old archive data from.