The Office for Mac folks over in the Mac Business Unit have announced availability of the public beta of Entourage for Exchange Web Services.
Exchange Web Services is a modern, robust protocol that enables client applications to communicate more efficiently with the server running Microsoft Exchange Server 2007 SP1 with Update Rollup 4 or later.
Besides saying goodbye to WebDAV, used by earlier versions of Entourage to access Exchange, Entourage users can now synchronize Tasks, Notes, and Categories with Exchange Server. Recipients can be resolved against the Global Address List (GAL) using EWS/HTTP, and improved AutoDiscover functionality to keep account settings up-to-date after setup.
More in Entourage for Exchange Web Services Beta is Live! on Mac Mojo: The Office for Mac Team Blog.