I have two different windows server failover clusters each of 2-Node on which there are FCI's as below.
Cluster-A(2node),instance-1 on Domain A
Cluster-B(2node),instance-2 on Domain B
Now is that possible to configure Always on availability groups between this two clusters(instance1 to instance2)??
Also can a availability group can be configured between two clusters which are in different domains?
I also know that availability group requires a windows cluster,but if we need to configure availability group between this two already existing clusters how it works.This thinking is creating a lot of confusion.