Alex, Practically speaking, you cannot have two Exchange servers mirrored and one server just waiting as a backup to the other. The mailboxes in the AD point to the Information store based on the Exchange server name. IF the Exch server is down, along with the server, the IS is also down. There is no way to replicate the IS to another Exchange server with a different name, and then make it online when the original server is down. You just cannot do that. Exchange is AD integrated, and needs to update its own databases reulary to keep in sync with rest of your network world. The options you have for fault tolerance is go for a cluster. NLB cannot be used with Exchange, since NLB does not provide application level FT. However, NLB may be used for your OWA servers to provide front end load balancing. Regards, Raj -----Original Message----- From: Alex Decarli [mailto:decarli@xxxxxxxxxxxxx] Sent: March 06, 2002 12:27 PM To: [ExchangeList] Subject: [exchangelist] RES: Re: Mirror Exchange http://www.MSExchange.org/ I don't want cluster. I want a secundary e2k like one domain controller. There is two domain controllers. When one is down , exist another. I want the same with exchange Alex Decarli -----Mensagem original----- De: Muqeem Syed [mailto:Syed.Muqeem@xxxxxxxxxxxx] Enviada em: quarta-feira, 6 de março de 2002 14:05 Para: [ExchangeList] Assunto: [exchangelist] Re: Mirror Exchange http://www.MSExchange.org/ Clustering... or network load balancing... front end back end concept.... yep there is a wide variety of choice available. Regards -----Original Message----- From: Eric Lanyon [mailto:elanyon@xxxxxxx] Sent: Wednesday, March 06, 2002 7:04 PM To: [ExchangeList] Subject: [exchangelist] Re: Mirror Exchange http://www.MSExchange.org/ Wouldn't that be clustering? Never done it, but it is possible from what I hear. >>> decarli@xxxxxxxxxxxxx 03/06/02 08:49AM >>> http://www.MSExchange.org/ I have installed Exchange 2000 with SP2 standard. Now , I want to create a secundary exchange 2000 "Mirror". How can i do ? thanks Alex Decarli ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: elanyon@xxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: syed.muqeem@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: decarli@xxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: psraj@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')