Can't add Exchange Server 2016/2019 server to a DAG Error:CreateCluster() failed with 0x42a
If you got this error during adding the exchange server to a DAG member. There are some points you need to verify:
- Verify the IPv6 option in the network adaptor. If there is something changed or added to that adaptor? Did you add a DNS suffix to that IPv6 Adaptor?
Solution: Try to remove the DNS suffix or any changes in the IPv6 adaptor. Then untick IPv6, Restart the server, and add to a DAG member again.
