Hi all,I amcurrently preparing a new AD domain which will be most probably Server 2003 64 Bitsbased anda new Exchange 2007 installation. The domain will span across 3 sites that are linked over Site to Site VPN Tunnel.AD, DNS,GCwill be installed in each site so that users would always connect locally. It will be one forest, one domain organization.Basically I want to have 2 mailbox servers (active/pasive)at the main location, one mailbox serverat one of the 2 others locations to fail over in case the 2 mailbox severs fail at the main location.Can some one help me to find the right documentation to deploy it?Regards,Antonio

Hi,You can use either CCR or SCC at the central location (both solutions are clustered solutions where you have hardware protection at the SCC solution and hardware and database protection at the CCR cluster.You can install SCR at the remote locations, but there is no automatic failover so you will need to test your failover before it is necessary.Leifhttp://technet.microsoft.com/en-us/library/bb124521.aspxhttp://technet.microsoft.com/en-us/library/bb125217.aspxhttp://technet.microsoft.com/en-us/library/bb676502.aspx

thanks for the quick reply. I will look