please check ip adddress assignment on this server and ensure that that subnet is added one of your AD site Dhruv

disjoin it from the domain, restart and then join it again Also like Dhruv wrote, check the AD sites so that all subnet's are configured Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

Hello, assuming that you try to install Exchange with the same patch level as the others you don't need to prepare the Schema with /ps if you have already an Exchange Server 2007 deployed. Additionally I'll check IP and DNS settings. Greetings, Toni

Hi Michael, Any updates? By the way,You must run this command on either a 32-bit or a 64-bit computer that is in the same domain and the same Active Directory site as the schema master. How to Prepare Active Directory and Domains http://technet.microsoft.com/en-us/library/bb125224(EXCHG.80).aspx Frank Wang

Hi All I am deploying Exchange server 2007 in a coexsting environment with exchange 2003 and exchange 2007, and when I run setup.com /ps I am getting this error : setup encountered a problem while validating the state of active directory: could not find Active directory site to which this server belongs. I have successsfully joined this server to a valid AD But I failing to procceed with the installation Kindly help thanks in Advance Michael

please check ip adddress assignment on this server and ensure that that subnet is added one of your AD site Dhruv

Hi Michael, Any updates? Frank Wang

disjoin it from the domain, restart and then join it again Also like Dhruv wrote, check the AD sites so that all subnet's are configured Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

Hello, assuming that you try to install Exchange with the same patch level as the others you don't need to prepare the Schema with /ps if you have already an Exchange Server 2007 deployed. Additionally I'll check IP and DNS settings. Greetings, Toni

Hi Michael, Any updates? By the way,You must run this command on either a 32-bit or a 64-bit computer that is in the same domain and the same Active Directory site as the schema master. How to Prepare Active Directory and Domains http://technet.microsoft.com/en-us/library/bb125224(EXCHG.80).aspx Frank Wang