Currently I work for a company with a single domain controller, a single file server, a single exchange server, and a single application server. We have a remote office 200 miles away connected via MPLS.
What we want to set up is a situation where the remote office houses servers that are not used unless there is a failure of our connecting circuit. We've come accross DFS and wondered if this would in part do what we are after. I'm not looking for specifics for how to configure things, just validation that we are headed down the right road.
This is what I have pictured right now... tell me if I'm correct or correct me where I'm wrong please.
We can set up a second domain controller at the offsite location (this part is just standard domain controller stuff failing over to it if the other is gone, right?
We then set up a second file server that uses DFS to be a 100% duplicate of the first fileserver. Then when the circuit is down, users at the second location will be talking to the second domain controller and it will be sending their file requests to the second fileserver. Then when the circuit comes back up they need to sync.
Exchange will need a duplicate as well, but I don't know if the term we are after is a clustered set-up or if there is a different way to acomplish a failover with Exchange. We have external mail coming in covered via a third party that will re-direct our MX record. We just need users to failover to the secondary Exchange server and when the circuit comes back up for the two servers to sync.
All I'm looking for is validation or correction, like I said. So an answer like "yes, you add a second DC to the network and add a second EX server as a cluster will do what you want" or "no, a clustered EX server won't act as a failover, you would need the failover EX product to do that"
Thanks in advance!