Hi,
good Morning.

I would like to hear a bit of the view you about DAG and CASARRAY scenario.

Today I have two CAS / HUB server (CASARRAY) and two MBX servers (DAG).

I remember that separated this way for a recommendation in the case of DAG in 2010, I would have to separate the functions.

Now I want to migrate to Exchange 2013, and need to plan the migration.

From what I read, as my Exchange 2010 SP3 is I can not install Exchange 2013 SP1 on coexistence.

I want to keep the CASARRAY and DAG environment.

What I have to do?

Install Exchange 2013 did the same for Exchange 2010 (2 x CAS / HUB and 2 x MBX)?

Or I can just two servers? (1 x CAS / MBX and 1 x CAS / MBX)?

I realized that Exchange 2013 does not appear in the Exchange 2010 console, right?

Thank you.

You can have either of the following configurations,

a) 2x AIO (mailbox + CAS) in a DAG

Hardware load balancer is required for CAS

b) 2x CAS + 2x Mailbox in a DAG

Hardware load balancer is highly recommended but Windows NLB also works for CAS

You can have either of the following configurations,

a) 2x AIO (mailbox + CAS) in a DAG

Hardware load balancer is required for CAS

b) 2x CAS + 2x Mailbox in a DAG

Hardware load balancer is highly recommended but Windows NLB also works for CAS

Then follows the same HA strategy Exchange 2010?

My environment has about 500 users at most.

I believe that two servers with DAG and CASARRAY be enough.

Hi,

To Help you to sizing your Exchange Server Infrastructure you can use  : http://blogs.technet.com/b/exchange/archive/2013/05/06/ask-the-perf-guy-sizing-exchange-2013-deployments.aspx 

Use Exchange 2013 CU8 : https://www.microsoft.com/en-us/download/details.aspx?id=46373

With this post you'll be able to quantifiy the ram disk required for your infrastructure for each server. You can deploy a infrastructure with 3x(CAS+MB) or more and your file sharewitness. With that you can make three copy of your database.  

Or Keep Your Actually topology.

To secure your data when you have lost a disk on a server You can plan to deploy AutoReseed : https://technet.microsoft.com/en-us/library/dn789209(v=exchg.150).aspx

I recommend a HLB (KEMP, F5...) use the least connection method.

Cordially

Yannick VILSANS

I would say it's quite similar but not the same. The main different is the hub transport role is at the mailbox server on 2013.

Hi Sandro,

Thank you for your question.

First of all, CAS array was not existed in Exchange 2013, but we could use DNS round robin or HLB.

Install Exchange 2013 did the same for Exchange 2010 (2 x CAS / HUB and 2 x MBX)? Or I can just two servers? (1 x CAS / MBX and 1 x CAS / MBX)?

A: In addition, if you want to achieve high availability on CAS and Mailbpx, we suggest you separate CAS  and Mailbox into different servers.

I realized that Exchange 2013 does not appear in the Exchange 2010 console, right?

A: We could not view Exchange 2013 in Exchange 2010 console, but view Exchange 2010 in Exchange 2013 EAC.

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim