I have a user with Outlook 2007 connecting to Exchange 2007 server all patched with latest SP and updates. The user opens multiple other user's mailbox (she has full rights to these) with her Outlook profile. The issue she is having when in cached mode only is that changes that are made to one particular mailbox calendar events (and changes that she makes) do not propagate to her calendar which you can imagine is frustrating and dangerous. When the user is not using cached mode or works in OWA but the changes that she has made to any appointment when in Cached mode are not there. The issue is only with one of the user's mailboxes that she edits. All mailboxes are on the same exchange server, simple network with a single domain.
I have recreated Outlook profile, deleted/recreated OST file, replaced computer (so user profile isn't the culprit), and the issue follows. New appointments created show up, edits to existing ones do not show up correctly.
User's orignal computer was XP Pro but new machine is Windows 7 Pro 64-Bit.
As a side note, I am also curious what the difference in the Outlook View between the 'My Calender's' group of calendars, contacts, etc. versus Other People's Calendars, etc.
Frustrated and ready to 'gasp' call Microsoft.