i am installing exchange 2003 for the first time and was looking for some advice. they want to have a client access server in the DMZ and the the postoffices on two different servers on the inside. and then a server a a dr site. I have installed plenty of 2003 exchange have not done 2007 what are the differences or some documents on client access server etc. thank you everyone
Exchange 2007, every role except edge, is not supported in the DMZ.
I would suggest you put ISA 2006 in the DMZ and publish the CAS services.