My setup: 1. 2 nodes exchange 2007 sp2 CCR 2. same AD site & subnet 3. single forest multiple tree 4. in 1 physical location while i am setting up the CCR either active nor passive node, i am getting the following error message. "This cluster spans multiple Active Directory sites. Exchange Server 2007 cannot be installed. Detected Active Directory sites: US,CN" Can someone help on this?

Check if your subnets are misconfigured in AD. -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "tmchin" wrote in message news:d170f1ac-30d7-49be-a932-b64042e09b15... My setup: 1. 2 nodes exchange 2007 sp2 CCR 2. same AD site & subnet 3. single forest multiple tree 4. in 1 physical location while i am setting up the CCR either active nor passive node, i am getting the following error message. "This cluster spans multiple Active Directory sites. Exchange Server 2007 cannot be installed. Detected Active Directory sites: US,CN" Can someone help on this? Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

checked subnet were same. any other suggestion?

What do you mean they were the same? -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "tmchin" wrote in message news:d11e590a-74d9-4aab-aaf7-34b4c7b5dbb1... checked subnet were same. any other suggestion?Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, Please confirm there is only one site in the environment. And ensure the subnet belongs to the site. You can open Active Directory Sites and Services to check it. Knowledge: Active Directory clients assume site membership by matching their assigned IP address to a subnet that is defined in Active Directory Sites and Services and associated with an Active Directory site. The client then uses this information to determine which domain controllers and global catalog servers exist in that site and communicates with those directory servers for authentication and authorization purposes. Exchange 2007 takes advantage of this relationship by also preferring to retrieve information about recipients from directory servers that are in the same site as the Exchange 2007 server. All computers that are part of the same Active Directory site are considered well-connected, with a high-speed, reliable network connection. By default, when an Active Directory forest is first deployed, there is a single site named Default-First-Site-Name. If no other sites are manually configured by the administrator, all server and client computers in the forest are considered members of Default-First-Site-Name. When more than one site is defined, the Active Directory administrator must define the subnets that are present in the organization and associate those subnets with Active Directory sites. Thanks Allen

This problem occurred because of forest prep done by exchange sp1 installation file. So go ahead to install exchange sp1 solved the problem.