How to Replicate two Exchange 2010 Servers

Hello all,
This is my first post here. I fear our organization may have made a grave error. Here is our basic setup:
Location 1 - 3 2008 R2 standard servers in a domain. 1 Exchange 2010 sp3 server.
Location 2 - 3 2008 R2 standard servers in the same domain connected over CISCO VPN. 1 Exchange 2010 sp3 server
Our objective was to replicate the first site at the second site. We have setup DFS and made a BDC at the second site, no issues. However, I have been doing some reading on Exchange replication, and it looks like we are in trouble. I had read that Exchange
2010 could be fully replicated over two servers (unlike 2007). However, I now have read that this requires the Enterprise edition of Windows server 2008 R2. So, I guess I have three questions to start:
Is there ANY way we can replicate site 1 to site 2 with the current setup? Even if it means site 2 is "inactive" unless we need it for a failure at site 1?
If not, can we upgrade to the enterprise edition for the servers? Any idea on cost?
If we upgrade to Enterprise, is there a decent place to go to read on how to setup the second site?
Thanks very much.

Hello,
According to your description:
"Is there ANY way we can replicate site 1 to site 2 with the current setup? Even if it means site 2 is "inactive" unless we need it for a failure at site 1?"
For CAS and Hub Transport roles you can simply deploy an additional server in secondary site and configure namespaces, mail flow etc. For mailbox role you should configure
DAG. But it requires at least Windows 2008 R2 SP1 Enterprise or Windows 2012 Standard. In addition you cannot mix Failover Clustering and Windows Network Load Balancing so
for full redundancy you need:
1. Four Exchange servers: 2 CAS + Hub Transport with Network Load Balancing and 2 Mailbox servers with DAG.
2. Two Exchange servers with CAS, HT and Mailbox and deploy hardware Load Balancer.
"If not, can we upgrade to the enterprise edition for the servers? Any idea on cost?"
In-place upgrade is not supported when Exchange server is installed. The only option is to deploy an additional server (Windows 2008 R2 Enterprise, 2012 Standard) and move
all resources from old server.
"If we upgrade to Enterprise, is there a decent place to go to read on how to setup the second site?"
The starting point is to configure Active Sites properly. For more info:
http://technet.microsoft.com/en-us/library/dd979799%28v=exchg.141%29.aspx
http://technet.microsoft.com/en-us/library/dd979781%28v=exchg.141%29.aspx
http://exchangeserverpro.com/exchange-server-2010-database-availability-group-installation-step-by-step/
http://www.msexchange.org/articles-tutorials/exchange-server-2010/high-availability-recovery/designing-site-resilient-exchange-2010-solution-part1.html
http://technet.microsoft.com/en-us/library/dd638121%28v=exchg.141%29.aspx
Hope it helps,
Adam
CodeTwo: Software solutions for Exchange and Office 365
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