Hi, recently I installed an active directory environment in order to install 2 exchange servers, I installed the first one with no problems but I was unable to install the second one. When I try to run the exchange CD appears an error message that says: " Microsoft Exchange has an unknown installation problem". I ran the DCDiag and NetDiag and I got the following message: "An error occurred when DNS was queried for the service location (SRV) resource record used to locate a domain controller for domain mx.deloitte.com. The error was: "No DNS servers configured for local system." (error code 0x0000267C DNS_ERROR_NO_DNS_SERVERS) The query was for the SRV record for _ldap._tcp.dc._msdcs.mx.deloitte.com" I don't know what's happening if I could install the first one why I am not able to install the second one?? Please help me with this... -- Thanks, Relicas