I exchange 2003 OWA:
I can access another user's calendar in OWA using http://server/exchange/user/calendar
It however does not allow me to CREATE nor MODIFY appointments. The save/close part of it is grayed out. I've made sure that the user accessing the OWA has OWNER rights even (every right available) - it still does not allow me to create nor modify - only read the calendar.
Did I miss something?