Microsoft has released their latest Update Rollup for Exchange 2010 SP1.  You can read about what is in the release at the Microsoft Exchange blog here:

http://blogs.technet.com/b/exchange/archive/2011/08/23/released-update-rollup-5-for-exchange-2010-sp1.aspx

Given that the last couple Update Rollup releases have been pulled back and re-released, you may want to consider taking a conservative approach to upgrading, only doing so if you have an issue addressed specifically by the rollup.  We do, however, encourage you to stay up on the latest update rollups in general, after they have been proven in the field for a while.

Friday, August 26, 2011 10:44:00 AM Categories: exchange_2010