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.

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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
The article that talks about the rollup that is going to fix this:
PaulDubAuthor Commented:
Thanks all
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