Three days ago, the Exchange CXP team released Update Rollup 5 for Exchange Server 2007 SP3 to the Download Center.
This update contains a number of customer-reported and internally found issues since the release of RU4. See 'KB 2602324: Description of Update Rollup 5 for Exchange Server 2007 Service Pack 3' for more details.
We would like to specifically call out the following fixes which are included in this release:
Read more at http://blogs.technet.com/b/exchange/archive/2011/09/22/released-update-rollup-5-for-exchange-server-2007-sp3.aspx
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