Hi, Below is teh environments

DC: Win 2008 R2 SP1

Exchange Server OS: Win  2012  R2 Std 

Exchange : 2013 SP1 Ent

Two Servers with CAS+MB role, already part of one DAG. I am trying to add one new server in existing DAG. The installation of exchange 2013 competed successfully. However when i am adding it to the existing DAG, the below error is coming. Please help to solve the issue. Thanks in advance.

A server-side database availability group administrative operation failed with a transient error. Please try the operation again. Error: An error occurred while attempting a cluster operation. Error: Cluster API failed: "AddClusterNode() (MaxPercentage=25) failed with 0x800706ba. Error: The RPC server is unavailable" [Server: cluster owner FQDN

Hi Manu,

Can you check if the IPV6 is enabled on all member server.

Hi Deepak,

The IPv6 is not enabled on any of teh serevr.

Can you confirm if teh cluster service should be running stateon the new serevr which i want to add in teh DAG?

As i can see it is in disabled mode.

Hi Manu,

As Deepak mentioned, please try to enable IPv6 on all member servers first.

Based on my research, In Microsoft Exchange Server 2013, IPv6 is supported only when IPv4 is also installed and enabled. If Exchange 2013 is deployed in this configuration, and the network supports IPv4 and IPv6, all Exchange servers can send data to and receive data from devices, servers, and clients that use IPv6 addresses.

Please also configure or disable Firewall to allow the connection.

 

Thanks