Exchange 12 MMC3.0 installation bug
There is a known issue when installing E12. E12 requires MMC 3.0 and .NET Framework version 2. Even with MMC 3.0 installed, installation fails:"Exchange Server '12' requires Microsoft Management Console 3.0."There is a workaround for this problem. Open the registry and navigate to the following:HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\Add a new key:MMC30CoreWorks first time with this key. Checkout the Exchange Team blog for more details. Technorati : bug, e12