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Stephen HopkinsFlag for United States of America

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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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Todd Nelson
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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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Ivan
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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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Thank you.