Currently, my network consists of 1 Exchange Server (v 4.0 with SP3) and
150 Users also using Exchange Client (v4.0 with SP3). I in the process of
moving my Server to a bigger box. I am also upgrading to version 5.0
Server. My question is, do I need to change all of my clients also or can
Exchange 4.0 Clients access a 5.0 Server and if so, are there any known
problems that I can avoid?? Any advice would be greatly appreciated.