Advise on using Branch office server as backup

Hello and thanks for assistance,
The site in question has four physical servers and two virtual servers. They have the following major functions. Server A is a DC/DNS server as well as hosting DFS files. Server B holds exchange server 2012A and the replica partner for DFS, Server C 
has two virtual servers installed. First one is exchange 2012B and second one is the antivirus server. Server D is a DC and a witness server. It also holds WSUS. Backup is taking as long as 12 hours. I had an idea of moving Server C and D offsite and configuring
them as branch office servers using VPN. Then all data including mail will be offsite and eliminate the need for backups. All servers of course have RAID1 so my concern really is not hardware related but disaster recovery in the event of fire, flood, ect.
I know this idea may be full of holes but that is why I am posting this for your opinions. There are about 50 workstations in the network. The client is very dependent on the network.
Thanks
Ronald C. Pope

Hi Ronald,
Of course you can create offsite Exchange server and DC. The connection performance may be an issue as you must use site-to-site VPN incase you need a failover.
Both topics are discussed a lot in Exchange and DC forum:
Advice for Offsite DC
http://social.technet.microsoft.com/Forums/windowsserver/en-US/237d8767-4004-448d-883d-ccb596b4da61/advice-for-offsite-dc
Onsite and Offsite Exchange 2010 Failover?
http://social.technet.microsoft.com/Forums/exchange/en-US/6cfdfa81-9a4a-499d-a0dd-96b6b8d07bdc/onsite-and-offsite-exchange-2010-failover
If you have any feedback on our support, please send to [email protected]

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