Exchange 2010 and Outlook 2003 Slowness

We recently went from Exchange 2003 to Exchange 2010 SP1.
Most of our staff are using Outlook 2003 SP3.

In Outlook 2003 e-mail messages take a long time to send and receive. They are running cached mode. I have read articles that talk about the UDP changes. The KB seems to be gone.  

Do I need to apply any rollups as we have SP1? One other question how can I tell what version of exchange I'm running to verify SP1.

Thanks
Paul
PaulDubAsked:
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MegaNuk3Connect With a Mentor Commented:
There should be a rollup released this month to turn on UDP notifications again. Cached mode should've sorted this for you.

Look at your version of exsetup.exe to tell the true version of Exchange
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MegaNuk3Commented:
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MegaNuk3Commented:
The article that talks about the rollup that is going to fix this:
http://msexchangeteam.com/archive/2011/01/28/457845.aspx
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PaulDubAuthor Commented:
Thanks all
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