Exchange Email No Longer Working After 4.3 Upgrade

Has anyone else experienced this? From the moment I upgraded my iPod to 4.3 I can no longer open my Exchange mailbox or contacts and calendars.
I've tried deleting and adding the account again and it appears to accept my details (it validates and creates the account) but as soon as I go into the mailbox I get 'Cannot Get Mail', 'The connection to the server failed'.
I'm the IT system admin at our company so I know that nothing is blocking or set up incorrectly, especially as this only happened from the moment I upgraded.
Does anyone know how to clear certificates on the iPod, this is my only other idea.

You're not alone, we're having exactly the same problem, see this thread over here http://discussions.apple.com/thread.jspa?messageID=13197799. Exchange profiles with certs broken by the iOS 4.2 to 4.3 upgrade.

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@ w3nitro
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Originally Posted by donasutton
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Originally Posted by donasutton
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