Shared Calendars slow to update users. Exchange 2010 / Outlook 2010

We have several executives who have Admins managing their calendars for them. When the executives add calendar entries themselves, it can take hours for those items to show up in the view their Admins see.
Admins have "Editor" rights in Outlook 2010.
We have Exg 2010 in a two server cluster scenario.
New items are a mix of items added in Outlook by the Exec or on his/her smart phone.

Any ideas?
Jason
JasonLattinAsked:
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akitsupportConnect With a Mentor Commented:
Do your Admins have cached mode switched on?  If they do I could be a good diea to switch that off.

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JasonLattinAuthor Commented:
OK. I believe they do. I'll ask them to uncheck that and see. i'm still open for any other ideas as well.
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akitsupportCommented:
Has this fixed the issue?
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JasonLattinAuthor Commented:
@akitsupport
I won't know for a while. We need to test it for a few days.
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akitsupportCommented:
So any update on this one?
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JasonLattinConnect With a Mentor Author Commented:
The issue did go away, but I suspect the issue was related to some performance issues we had with our Exchange servers. In summary... we really don't know what solved the issue, if anything. The Admins may have just given up asking about it, but I honestly think the issue is resolved. We were making alot of changes at once to the email system to deal with some overall performance issues and it is possible one of those many changes helped. I really don't know.
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JasonLattinAuthor Commented:
The issue did go away but I'm not convinced that undoing cached mode was the fix. I'm giving credit because it possibly could have helped. I don't know for sure because other changes to the underlying storage system and other settings on the Exchange servers were being done at the same time and any of those fixes could have been "the one".

I do appreciate the attempt to help. This go around the answer just isn't very clear cut and may not help anyone after us reading these posts.
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