I've decided not to install any of the rollups microsoft release for exchange server 2007. I installed rollup 3, it screwed up my OWA. I installed rollup 4(it took an average 3 hours to complete), it brought down my CCR cluster along with HUB and CA. Services do not start, my cluster wont move, mailflow stopped. What a disappointing fact. I spent almost 4 months planning and setting up that CCR. Now its juts useless. I read the entire release notes but did not find anything like this mentioned in it. now I see i'm not the only one with the same issues. where do you guys test the rollups? My setup was brand new. everything setup as per MS best practices. Windows 2008, exchange 2007 sp1, OS updated, how could this happen? the only additional software in these servers were McAfee AV. Very Very disappointing.