Microsoft Exchange mailbox database copy status healthy but get-cluster node status showing DOWN

Marcus Wong Theen Nam 1,091 Reputation points
2020-11-14T16:56:08.56+00:00

We have a DAG with 3 nodes, after we performed windows update and rebooted all the Exchange servers. There are 2 nodes showing "Down" when we run get-clusternode cmdlet. The mailbox database copy status for all the mailbox servers are showing Healthy/Mounted. However we are unable to do any switchover/mount the database copies on the nodes that are showing down in failover cluster.

There is no firewall in between and the OS internal firewall has been turned off. Other than re-creating the DAG is there anyways then can overcome this?

Any idea guys?

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. Marcus Wong Theen Nam 1,091 Reputation points
    2020-12-23T08:08:56.853+00:00

    Hi there,

    Sorry for the late respond. After troubleshooting on these servers for few weeks, I've found out the root cause was due to the Antivirus firewall blockage. After disabling the antivirus issue resolved immediately.

    Thanks for the assistance.


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  1. Andy David - MVP 139.4K Reputation points MVP
    2020-11-14T18:36:41.397+00:00

    What does
    test-replicationhealth
    show?

    Is the cluster service started on those servers?

    Can you simply bring the cluster node up?

    Start-ClusterNode <Node>