Microsoft Exchange - Random Machines Not Updating

We have :

50 Users / 25 Terminal Users

2008R2 - Terminal Server x 2 (brokering)
1 x Microsoft Exchange 2010 Server (CAS)
1 x Microsoft Exchange 2010 Server (Mailbox)

We have at random intervals computers that are not updating without pressing Shift+F9.

The exchange CAS server logs are clean and there is no connection issue out of the ordinary, when they press Shift+F9 everything goes good, but it automatically would not come through.

Most of the clients are 2010 - 14.0.6112.5000 running RPC over HTTPS.

I have tried :

- Headers Only
- Full Items
- Deleting / Compacting OST
- Reinstalling Microsoft Office

It is very intermittent and seems to happen only on random computers.

It says down the bottom "last updated 21/09/2012 @ 12:34pm" so it doesnt say "All folders are up to date".

The user could login the next day and everything would be 100% fine, so it is an annoying one.

The exchange servers are both running SP2, i can get the actual version if this is required.

Would appreciate any help.

Cheers,

Adam
elevatecsAsked:
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MegaNuk3Connect With a Mentor Commented:
Install the latest Outlook 2010 hotfix as that sorts out quite a few sync issues:
http://support.microsoft.com/kb/2598374
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elevatecsAuthor Commented:
To add, we have workstations running XP/7 that this also happens on. Any advice would be much appreciated.

Cheers,

Adam
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Malli BoppeConnect With a Mentor Commented:
Are the user in cached mode or online mode.
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elevatecsAuthor Commented:
All users are configured

- Cached Exchange Mode
- Full Items

The reason i have opted for cached is to reduce the amount of traffic downloading on the network, some user mailboxes are large.

I will apply the hotfix, however this issue only started recently and seems to apply on different machines, different O/S, different hotfix/application levels on the workstations/terminal servers so i am skeptical if it is an issue with the workstations.

To add, there is an ESET plugin that has been recently installed / updated on the workstations / computers.

I didnt think this would be the issue as i would imagine it would cause more common errors, i was going to remove the plugin and see what happens.

Any more advice would be appreciated.
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MegaNuk3Connect With a Mentor Commented:
Try "outlook /safe" and if that works then try "outlook /noextensions". If the /noextensions works then you know an addin is causing the issue.
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elevatecsAuthor Commented:
The issue was not resolved. Server was reloaded and this seemed to resolve the issue, so it was definately something server side.
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