This content is 18 years old. I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. Please be warned that the information here may be out of date.
Exchange Server 2007 has the potential to shake up messaging but there is no direct upgrade path for those organisations still running Exchange Server 5.5 (and there are a surprisingly high number of these). All is not lost though as, earlier today, I heard Joe Baguley, Global Product Director for Quest Software, give a presentation of the various tools that they now have on offer (the list is impressive) and, interestingly, Quest plan to have Exchange Server 5.5-2007 migration tools available when Exchange Server 2007 is released, as well as tools for migrating Exchange public folders to SharePoint.