Hello all,

My environment consists of the following:

- 1 Exchange Server 2010

- 1 Exchange Server 2013:80% users are on this server.

I still have some users on Ex 2010 because these are Blackberry Users and my blackberry server is not compatible with Exchange 2013.

So for some reasons (Cost, management decisions etc) I have to maintain Ex 2010/2013 in my environment some a lap of time.

But I have to deploy DAG, that replicate my exchange database to my DR Site.

Question:

- On my DR site, can i have one server running Exchange Server 2013 which will accommodate the databases from Ex2010 & 2013.?

- Or i should be having two versions of exchange on the dr site?

Kindly advise best way out to have my database 2010 and 2013 replicated to my DR.

Hi,

We cannot co-exist Exchange 2010 & 2013 mailbox servers on same DAG. You need different DAG for both versions.

Regards

Vickram M

Hi,

Let me make it clarity:
The DAG is the new cluster technology from Exchange 2010 and also included in 2013. It give us the opportunity to have a mailbox database replicated between two or more servers, the DAG can have utilize up to 16 copies of each database (16 different servers). The advantage of this is that if one server fails, its easy and very fast for doing switchover/failover to another server.
Some interesting changes around databases are that each database runs under its own process in Windows. Store (ESE) is totally rewritten, which means you cant use databases from older versions of Exchange directly on Exchange 2013.

No you cannot house both version of exchange in a single DAG as the technology of replication and store engine is different. You will need to have both version of exchange in your DR site.