Err Remove-DatabaseAvailabilityGroupServer from DAG

Question

Hello guys,

I've cought the problem: cannot remove one of three servers from the DAG Exchange 2019.

The details from operation log are:

SetFswSharePath() caught an AmClusterApiException with errorcode=-2147467259 and NativeErrorCode=1168. ex = System.ComponentModel.Win32Exception (0x80004005): Element not found

WriteError! Exception = Microsoft.Exchange.Management.Tasks.DagTaskProblemChangingQuorumException: There was a problem changing the quorum model for database availability group <DAGNAME>. Error: An error occurred while attempting a cluster operation. Error: Cluster API failed: "ClusterResourceControl(controlcode=CLUSCTL_RESOURCE_SET_PRIVATE_PROPERTIES) failed with 0x490. Error: Element not found"

I Googled online for a few days, but no one had anything like that. In other respects, the servers work without any visible problems.

Answer 1

Finale:
It seems, the problem have been related to the authorization of the Remove-DatabaseAvailabilityGroupServer execution.
Despite the fact that access to all objects of the DAG cluster was done correctly, and rechecking everything and everywhere did not give any result.

In the result the studying many forums on similar cluster problems led to the idea that I need to manually change the quorum type Set-ClusterQuorum -NodeAndFileShareMajority [path] -Credential (Get-Credential).

Then Remove-DatabaseAvailabilityGroupServer has been executed without failures

Answer 2

I have done some research on your error messages, and there are many potential causes for Cluster communication failures, including:

• Network latency
• Network outages
• Faulty drivers or network cards, including TCP offload issues
• Misconfigured firewall rules
• Security software such as anti-virus, intrusion detection, etc.

Solutions in the articles for your reference: Failover Cluster Communication Failures and Troubleshooting cluster issue with Event ID 1135
In addition, if all of the above solutions don't work, seek a windows server expert for support.

Also if you need to recover failed member of a database availability group? Read this guide.

Answer 3

This still applies:
https://practical365.com/unable-remove-failed-server-dag-exchange-server-2010/

Remove-DatabaseAvailabilityGroupServer -Identity DAG -MailboxServer EX2 -ConfigurationOnly
Import-Module FailoverClusters
Get-ClusterNode EX2 | Remove-ClusterNode -Force

Answer 4

Hello @Sergey Potemkin

There is an official Microsoft article that is providing exact steps about best practice how to remove Database Availability Group Server:

Remove-DatabaseAvailabilityGroupServer
https://learn.microsoft.com/en-us/powershell/module/exchange/remove-databaseavailabilitygroupserver?view=exchange-ps

Try following the steps by adjusting the commands to your needs and see if it gives you the result you are expecting.

Hope this helps with your query!

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Answer 5

I deploy a two nodes DAG recently, the Witness Server doesn't show as a node in the Windows Cluster:

Witness is being used:

So, it is an expected behavior that Witness isn't a node.