We use Windows Update to keep our workstations and servers current. When Exchange Server 2007 RU3 hit, our servers went off line. We could not get our services to come on and had to remove the RU3 and go back to RU1 to get them running again.
Last week RU4 hit with the same effect. We could see the services but could not start them. Again we removed RU4 and went back to RU1 and everything started again. I have not been able to find any documentation on this and am worried as I see that RU5 is due out shortly. Any suggestions?