We just started implementing Exchange 2007 SP1 into a current Exchange 2003
org. Everything is going as planned including SCR except for one aspect...
Our org is as follows:
3 sites

I have several questions related to the Design and Deployment that I am
hoping someone can help with.
First questions is in relation to the amount of memory you can specify per
user for caching.  MS recommends between 2MB and 5MB, but can you assign

Situation:
Mulitple AD sites, in every site 2 or more hubs, no edge....when user in one
site sends mail to internet user, does that goes directly from mailbox to hub
server in that AD site and then HUB sends that mail directly through it's

I have two exchange servers on two different domains (2 seperate
LAN's)sharing the one internet connection.
There is a sub-interface on the WAN to seperate the mail.
I would like to share users calendars and contacts between the two

I know you all are terrified about the subject....
but I have a customer with no so much budget  to justify an Exchange2007
only server.
Moreover we are talking about not more than 30 e-mail client (!!)

We are looking at migrating from FirstClass to some other communication
system that is easily integrated into EPiserver and other systems being
developed. Exchange is an obvious candidate.
What I am a bit worried about is the management costs in HR to maintain

We have 3 locations, 3 AD sites, internet connectivity for all users goes
through one internet link in one site.
Is it possible for all inbounf mail flow from the internet to go through one
HUB server? and then that HUB servers forwards mail to other HUB servers

In one of our clients we have a E2k3 Standard. We would like to know if
we can use another E2k3 Standard as a front-end for this one. This
front-end would be located in a DMZ.
Thanks in advance,

1 org, 2 sites, with a hub transport server in each site.
Is it possible to subcribe each hub transport server to an edge in its own
site?  
Each site would have, and Edge, Hub Transport, CA, and Mailbox Server.  MX

Here's my code, verbatim:
conn = ("Provider=Microsoft.Jet.OLEDB.4.0;Exchange 4.0;MAPILEVEL=Public
Folders|All Public Folders;DATABASE=C:\\Temp\\;")
Set rstEmails = New ADODB.Recordset

I'm designing an environment with 2 Edge Transport servers and 2 Hub
Transport servers. The rest of the design consists of 2 CAS servers (NLB)
and CCR for the MB role.
To make the ET servers available I can choose for 2 MX-records and redirect

i have exchange 2000, and we want to create a new domain name, and install
exchange 2003, so how i can take all my users accounts and with there mail
boxes to the new exchange 2003 server and the DC
Thanks .

We are currently running E2003 SP2 and will be migrating to E2007.  I am
looking for a consulting company in the Wash, DC area that has expertise in
2007 and can come with a recommendation.  Thanks, Rory

If a company already uses the Exchange Hosted Services Filtering service is
there any additional benefit to be gained by deploying Edge Transport
servers when they will not be required for Virus and Spam checking?

I am planning to re-size my hard drives, currenyly i have the OS on C:
Database on D:
Logs on E:
The C: and the E: drive are on a Raid1 mirror and the D: drive is on Raid 5.