Hello, i've resolved lot of previous errors and prerequisites of Exchange 2010 installation, and now... could not find domain or domain controller! The existing DC is a win2008SP2 eng, the new server is win2008r2sp1 ita and correctly inserted into domain. No DC replication roles installed on new server, it's correct? Primary DNS on new server is the IP of existing domain controller, why exchange installer can't find the domain? Many thanks!! Roberto

Intel Itanium IA64 processors not supported http://technet.microsoft.com/en-us/library/aa996719.aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hello, thanks for reply, but there are no Itanium processors in these machines! I've checked all requirements, and are all ok.. Many thanks! Roberto

You mentioned "is win2008r2sp1 ita" which I thought you meant itanium. If that is not the case on your exchange server open cmd dcdiag /s:domaincontroller and post the output Also go ahead and just join it back to the domain and re-run setup.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com