Hi,

Do you need Enterprise CALs to leverage Database Availability Groups in Exchange 2013 or 2010?

Regards,

Krisna

Nope.

Hi Krisna,

Thats a no, as suggested by Li Zhen.

Check out the differences and requirements here Exchange Server 2013 licensing , Features Licensed by Exchange Server 2013 CALs

What you need to worry about this the underlying Windows Server. DAG utilizes the underlying FailOver Clustering of a Windows Server behind the scenes.

Hence you can't use Windows Server 2008 Standard Edition, as it doesn't have FailOver Clustering. You need minimum of Win2008 Ent, DataCtr to support DAG. Failover Cluster is now a feature of Windows Server 2012 Standard and Datacentre Edition, hence no issues there.

More detailed:

Creating DAGs

DAGs use a subset of Windows failover clustering technologies, such as the cluster heartbeat, cluster networks, and cluster database (for storing data that changes or can change quickly, such as database state changes from active to passive or the reverse, or from mounted to dismounted or the reverse). Because DAGs rely on Windows failover clustering, they can only be created on Exchange 2013 Mailbox servers running the Windows Server 2008 R2 Enterprise or Datacenter operating system, Windows Server 2012 Standard or Datacenter operating system, or Windows Server 2012 R2 Standard or Datacenter operating system.

Note:
The failover cluster created and used by the DAG must be dedicated to the DAG. The cluster can't be used for any other high availability solution or for any other purpose. For example, the failover cluster can't be used to cluster other applications or services. Using a DAG's underlying failover cluster for purposes other than the DAG isn't supported.

Nope.

• Marked as answer by Krisna.Gokoel 7 hours 5 minutes ago

Nope.

• Marked as answer by Krisna.Gokoel Saturday, June 06, 2015 12:23 AM

Nope.

• Marked as answer by Krisna.Gokoel Saturday, June 06, 2015 12:23 AM

Satyajit,

Thanks for the detailed explanation.

Regards,

Krisna

Hi Krisna,

My pleasure, glad that it helped.

Hello,

More differences between Standard and Enterprise:

https://products.office.com/en-us/exchange/microsoft-exchange-server-licensing-licensing-overview?legRedir=true&CorrelationId=b241cf1a-cf93-4cff-9dad-3e1e5026aeed

 

Thanks,

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