I have a brand new installation of Blackberry Enterprise Server Express running on an Exchange 2007 Server. Everything is working fine except for calendar synchronization. Anything I do in the calendar within Outlook will show on the Blackberry calendar, but nothing I do in the Blackberry calendar will show in the Outlook calendar. By anything I mean creating, editing and deleting appointments. It is effecting all blackberries. Any suggestions on how to attack this?