Outlook 2007 in cached mode calendar edits not showing for other users

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.

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Adam BrownSr Solutions ArchitectCommented:
This is probably due to her outlook not talking to exchange often enough. Take a look at configuring fast caching in outlook. http://www.expta.com/2010/10/how-to-configure-fast-cached-exchange.html has information.
Adam BrownSr Solutions ArchitectCommented:
In answer to your side note, they My Calendars group is calendar folders that are tied directly to the user's mailbox. Other people's calendars shows shared calendars that the user has connected to.
teresab108Author Commented:
I applied this edit but it did not do the trick.  Updates made by a 3rd user weren't seen by the problem user unless i manually forced an update, updates by the problem user weren't seen by others until i forced an update on her computer - by  using Shift-F9 (or Tools, Send/Recive, This Folder (Microsoft Exchange Shift+F9)  - a send/receive all F9 does not propagate the change.

This user opens 10 mailboxes other than her own and I see this in this user's Outlook calendar view, under 'My Calendars' she sees all but one of these other calendars listed 2x.  The one that is not listed a second time is a resource calendar.

As for my side note, I see all of the user's calendars (in duplicate) listed under "My Calendars" and a few (some in duplicate, some not) under People's Calendars.
teresab108Author Commented:
Update:  I found that the users had Outlook anywhere configured even though the machines were desktops in the same office as the server - we disabled that and the appointment synchronization issue sees to be resolved.

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