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Exchange 2010 - Some users have slow outlook

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Exchange 2010 - Some users have slow outlook - 29.Aug.2014 5:52:37 AM   


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I have a bit of a strange one here in that we have some users noticing that when they have not used their outlook for a little while and then come to try send/reply to a message or in some cases even just open a message, then Outlook seems to hang and give a not responding message.
Even I myself have noticed this at times. It seems to only be after you have not touched outlook for a few minutes at least.
These mailboxes are using Cached exchange mode and their mailboxes are only a few hundred MB large.

When I ran the Exchange troubleshooting guide it told me that the Top 6 users accounted for more than 50% (this figure varied but it always above 50%) of my MAPI CPU.

So I tried to install EXmon to find out which users these were, but when I try to start Exmon I just get an Unknown StartTrace error (183).

Anyway, moving on I started thinking that this issue only seemed to present itself when we started putting more activesync devices on the network. Could these devices that are generally set to Push mail, be causing this slowdown issue?

Otherwise, if not, then could anyone else offer any suggestions/solutions to this issues?

My pc is running Windows 7 64bit and Outlook 2010 (the same as someone else in the office who noticed the same issue), all windows updates have been applied on both the local machine as well as the Exchange servers.

We have 4 Exchange servers. 2 X CAS servers in a DAG and 2 X MBX servers. The 2 people I have mentioned as examples were both in the same database, so I did try moving one of them, but same issue.
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