Exchange 2013 Server Failover

We have 2 site....First site is our main office running Exchange 2013 (VM) and a AD DS (VM).  The Second site is a co-location which will have the same setup.  Is there a way to setup of the co-location site as a failure and how would I do it with only 2 VM servers, 1 at each site.  Please advise. (VMware)
PowerC280Asked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
VMware Replication
http://www.vmware.com/products/vsphere/features-replication

Veeam Backup and Replication
http://www.veeam.com/vmware-esx-backup.html

Depends on your budget, and infrastrucutre, and how quickly you want to failover.
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PowerC280Author Commented:
Once data is on both machines if my main site goes down how fast will the co-location pick up using the VMware Replication?
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PowerC280Author Commented:
I need both exchange servers running at the same time.
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Simon Butler (Sembee)ConsultantCommented:
For Exchange, a DAG will do the job for you.
You will need to have each site in a different AD site.
For completely seamless failover you will need a load balancer though.
The server in your main office will be active, the data centre will be passive.
If you point your MX records at the server in the data centre, then email will continue to flow as well.

Simon.
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PowerC280Author Commented:
What do you mean by (a different AD site).  Do I need to have a AD DS at the co-location site with the exchange at that site?  Do I need to buy another copy of exchange 2013?  How would I point the MX records to both site so mail will flow?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Replication is not the answer for your requirements.

two MX records in DNS, if the first MX record is not available, mail will be delivered to the second MX record.
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PowerC280Author Commented:
hanccocka....what do you recommand in this situation????

So, at the co-location I would have AS DS which I will join as a member to my main location and have the DAG take care of exchange 2013.

What would be the correct way to do this?

I know that sometime some people have their way of doing things and I do thank Sembee2 for his input.  I just want your input because I have dealt with you before and your info was right on point.

Thanks guys
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Simon Butler (Sembee)ConsultantCommented:
"What do you mean by (a different AD site).  "

For the Exchange DAG to work correctly, you need to have AD sites and Services configured in the correct way. That means each physical location has its own AD site, own subnet etc.
If you don't do that, then you can get some odd things happening, like Exchange using the remote DC instead of the local one (which has a performance impact).

Simon.
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PowerC280Author Commented:
ok...so the co-location should not be a member of the main site...right

or should the co-location be on the same domain as the main?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
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