I am new to ms-exchange, I required valid tips from tech gurus. I am assigned to perform the upgradation of exchange 2000 in windows 2000 member server to windows-2003 member server. The exchange server needs to be upgraded to exchange 2003 in a clustered node. Also needs to install a owa server in DMZ. Can any tech gurus please explain how to proceed in these scenario. Your values are highly appreciated.