Hi would there be any limit on the mailbox server in a single domain

Hi

You can have multiple servers using a DAG, limitation on the databases if standard edition is used.

Are you asking the limit of servers?

Hi Fartmans,

In Exchange Server 2013, Mailbox server is the most significant role besides CAS server. It almost does everything including bifurcation, agent and routing.

Based on my experience, here are some information and the corresponding hyperlinks that you may demand:

1. There should be 16 mailbox servers at most per DAG in Exchange 2013. Here are the reference on DAG in Exchange 2013: http://technet.microsoft.com/en-us/library/dd979799(v=exchg.150).aspx .
2. The maximum of databases per mailbox server is 50 with Enterprise Edition while 5 with the Standard Edition.
3. Here is the reference about sizing and capacity planning guidance of Exchange 2013. http://blogs.technet.com/b/exchange/archive/2013/05/06/ask-the-perf-guy-sizing-exchange-2013-deployments.aspx .
4. This is the reference about Exchange 2013 Server Role Requirements Calculator . http://blogs.technet.com/b/exchange/archive/2013/05/14/released-exchange-2013-server-role-requirements-calculator.aspx .

I hope it can help.

Regards,

Rebecca

Hi

You can have multiple servers using a DAG, limitation on the databases if standard edition is used.

Are you asking the limit of servers?

Hi the number of server i can have

Hi

As Rebecca Tu posted you can have 16 mailbox servers in a single DAG and if you were using Windows NLB you are limited to 8 servers in that cluster.  Outside of this there is no limit on the number of servers you can have ... as long as they are all licensed.

Steve