Windows Server 2008 deployment/architecture question

my question in not related server 2008 apologize in advance if message in wrong forum couldn’t find better place post it. trying idea of architecture when deploying microsoft solutions.

      let’s deploying brand new setup company of 100 users. have lan domain controller , file server , have closet @ datacenter domain controller , exchange server. architecture perspective options are:

1.  1. use 2 different domains (one in lan , 1 in data center), set 2 profiles single users , pay 2 sets of licenses

2.   2. use 1 domain set firewall rules allow sync between dc on lan , dc in data center , buy 1 set of windows cals

3.   3. something else???

what “best practices” way of doing this? guess there option of trust between domains how differ (from network security perspective) 1 domain , 2 dcs (one local , 1 remote)? in advance suggestions.

two things:

the exchange server in data center can use domain controller have @ office.  long can connect each other there's not problem.

 

you're better off putting secondary domain controller @ data center; latency / fail on purposes.  again, means single domain, not multiple.

 

that said, please review cal licensing model.  disclaimer: not cal expert.  call microsoft.  looks if did per user/device model 2 domains you'd buy 1 set of cals. see http://www.microsoft.com/windowsserver2003/howtobuy/licensing/caloverview.mspx

 

 

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