Exchange server 2003 SP2 running on Windows server 2003 SP1 in a front-end/Back-end Environment.
We are going to be adding a second facility and will want to setup the exchange environment so that if either facility where to "go down" the other facility could support all users. The site will have different IP addresses, and will be physically distant from each other. Bandwidth will be high - but perhaps not as high as 100 based LAN.
What options do I have? Will it require third party software?