Recently we upgraded to a new email server. We went from Exchange 2000 to Exchange 2007. Since that time, users who have Outlook 2003 and earlier are getting "no free/busy information could be retrieved" when trying to view shared calendars. I've been reading and apparently we need to setup Free/Busy Public Folders or something to that effect... I am just not sure how to do that. Anyone have any ideas on this issue? Is the aforementioned folder creation the answer or is there something else we can do to resolve this?