I am using SBS2003 with Exchange 2003 and Outlook 2003. We have 3 staff members and all have shared their calendars. Everyone is setup with Author permissions on each others calendar. Everyones permissions are set to Create, Read, and Folder Visible. They are allowed to edit and delete thier own items. Two of our staff can edit each others calendars and mine. I can view each staff persons calendar but can only add items to one of them. When I click on the other users calendar to setup an appointment I get the message "Unable to open Free/Busy information". I have tried removing myself from the list of people the calendar is shared with and adding myself again. I've tried changing my permissions from author to editor, to publishing editor, etc. I have tried changing the amount of Free/Busy information published for this user from 2 months to 6 months. I've tried rebooting the server and all workstations. It is critical that I be able to edit this users calendar from my workstation. FYI I am a member of the domain admin group the others are members of the users group.