Outlook 2003 defaults to cached mode when you create a profile. I noticed that it seems to take a few minutes, when using Outlook, to sychronize with the server. It's different on each machine. Do you know how frequent the synchronization happens? Is it every minute, 5 minutes, or something like that? I would like to know the default behavior of Outlook 2003 cached mode. By default, how frequent does it update the Exchange Server?