I've been thrown into the Exchange environment. I don't know too much about setting/managing the Exchange Server besides sending emails on it and setting up profiles. And I don't know anything about clusters. From what they (the exchange admin) are telling me they are saying that they initially had 2 servers (one front end and one back end) and that they had switched to a cluster environment, eliminating the need for a front end server. Could someone explain to me in simple terms what a cluster is and how (and why) you would be using it for the Exchange environment? And why did they have 2 servers before -- is this the norm in setting an exchange environment up? And in general terms, what would be needed to cluster it (does it physically mean you need another server or software to install?)
And are there any good useful (and easy to understand) sites I can go to?