I solved my Calendar issues with Outlook 2k3 this morning. Not sure exactly what the solution was, but by logging onto a downlevel client (98 with office 2000) and then logging into my mailbox as me AND changing permissions for one user from reviewer to author (which I needed to do anyway) I then found that everyone else can now view the calendar….and its only taken 15 days to crack it. Now the annoying thing is that I don’t know what caused it or which of the two things fixed it.