Exchange DAG and Cluster group does not match

Oren Iwanaga 21 Reputation points
2022-08-16T17:27:11.01+00:00

We have two Exchange 2019 Servers in a DAG group that is viewed by the Exchange Admin Console as DAG01. There is no Cluster Name Object (CNO) in AD. Cluster services are running.

On both servers the PowerShell command Get-ClusterGroup returns:

Name OwnerNode State
------
Available Storage Mail03 Offline
Cluster Group Mail03 Online

Mail03 is the name of one of the DAG members. It holds a healthy copy of the 2 mail DBs and is the Primary Active Manager.

Should the Cluster Group be the name of the DAG? If so, what are methods to fix?

Thanks.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Accepted answer
  1. Andy David - MVP 141.2K Reputation points MVP
    2022-08-16T19:41:45.877+00:00

    No, thats expected.
    that command shows the OwnerNode and the cluster generic windows name. There are only a few windows clustering components in an Exchange cluster.

    you get the name of the DAG with

    get-cluster  
    
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3 additional answers

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  1. Jame Xu-MSFT 4,166 Reputation points
    2022-08-17T06:36:07.11+00:00

    Hi @Oren Iwanaga ,
    The Cluster Group do not need to be the name of the DAG.
    You could refer to the documentation:
    https://learn.microsoft.com/zh-cn/Exchange/high-availability/database-availability-groups/database-availability-groups?view=exchserver-2019


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  2. Oren Iwanaga 21 Reputation points
    2022-08-17T15:02:56.187+00:00

    Thanks to both experts for the clarification.

    What started this is that I was concerned that the Primary Active Manager is on Mail03 and wanted to migrate the function to Mail01. Should the Move-Clustergroup -Cluster Mail03 -Node Mail01 -Name "ClusterGroup", work in this case as it does not see the DAG name as a cluster but rather sees the node Mail03 as the cluster group?


  3. Oren Iwanaga 21 Reputation points
    2022-08-17T15:36:52.56+00:00

    Thanks. Will try it out.

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