Hi all,

We currently have a single box running SBS 2003 & Exchange 2003. We are in
the process of architecting a solution where we will be able to split
Exchange & ISA onto seperate boxes for various reasons including
performance.

CURRENT SETUP:-

Corporate Office:-

1. SBS Server dual homed w/ ISA
   a. Public NIC - 172.18.2.250 (connects via WAN point to point to our
data center (20 miles away) to their firewall)
   b. Private NIC - 10.0.0.x
2. Domain - mycompany (mycompany.local)

Data Center:-

1. Several Web & DB Servers (Production Stuff)
2. 3 Networks
   a. 172.18.1.x - Middlenet - used for internal communications
   b. 172.18.2.x - web nlb load balanced
   c. 10.2.18.x - backnet to monitoring & SAN
3. Domain - mycompanydatacenter (datacenter.mycompany.local)

FUTURE SETUP (CONTEMPLATED):-

Corporate Office:-

1. Dedicated Domain Controller - mycompany.local - root of forrest
2. ISA on DC

Data Center:-

1. Redo Domain - datacenter.mycompany.local - make sub-domain of
mycompany.local
2. Dedicated Exchange Server

Operations Office:-

1. Point to Point to Corporate Office
2. Seperate Domain Controller - operations.mycompany.local

Questions:-

1. Am I on the right track with the architecture? Or am I totally off base?
The goal is to have a scalable and eventually high availability solution.
2. Would the Exchange box in the data center need to be on the same network
as the clients in each of the offices? Or does that not matter? Would users
need to login everytime in Outlook if the Exchange was on a seperate
network?
3. How would I setup the ISA? Dual homed nic?
4. What would be the best practices way to set this up?

TIA!