Unable to add DAG member on exchange 2016 DAG group

Sayad Hussain 1 Reputation point
2022-06-29T16:05:08.227+00:00

Im trying to add a 3rd member to exchange 2016 DAG group.

When I try to add via Add-DatabaseAvailabilityGroupServer -Identity ExchangeDAG -MailboxServer EX-new I get below error:

A server-side database availability group administrative operation failed. Error The operation failed. CreateCluster  
errors may result from incorrectly configured static addresses. Error: An error occurred while attempting a cluster  
operation. Error: Cluster API failed: "AddClusterNode() (MaxPercentage=100) failed with 0x5b4. Error: This operation  
returned because the timeout period expired". [Server: EX2-Server.local]  
    + CategoryInfo          : InvalidArgument: (:) [Add-DatabaseAvailabilityGroupServer], DagTaskOperationFailedExcept  
   ion  
    + FullyQualifiedErrorId : [Server=EX2-SERVER,RequestId=63a901cb-bf00-44c6-853d-638e636edddb,TimeStamp=29/06/2022 1  
   4:49:26] [FailureCategory=Cmdlet-DagTaskOperationFailedException] BDD44053,Microsoft.Exchange.Management.SystemCon  
  figurationTasks.AddDatabaseAvailabilityGroupServer  
    + PSComputerName        : ex2-server.local  

Already tried basic troubleshooting. Disabled IPV6, Disabled Firewall + AV.

Full error report is attached. Can anyone please help?

216221-report.txt

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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