Exchange Server 2013 Database Availability Group (DAG)

Do you need to create a DAG if you only have 1 Exchange Server 2013 and no other Exchange servers of any type?
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Stephen HopkinsLead Cybersecurity EngineerAsked:
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IvanConnect With a Mentor System EngineerCommented:
Hi,

no, you don't need to do it. There is no effect. DAG is designed to allow redundancy when you have multiple servers.

You can read about it in articles like: http://exchangeserverpro.com/exchange-server-2013-database-availability-groups/

Regards,
Ivan.
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Todd NelsonSystems EngineerCommented:
Not needed.  It serves no purpose to have a one member DAG.  DAGs are to make databases highly available across two or more Exchange servers.
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MAS (MVE)Technical Department HeadCommented:
Hi
You can have DAG with one member but it will not help you. DAG is designed to failover to the available member when a DAG member fails. In your case it will not happen.
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Only thing is you can create database on DAG which will save time when you have one more member to add in DAG in future.
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Stephen HopkinsLead Cybersecurity EngineerAuthor Commented:
Thank you.
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