This article describes how to register and monitor an Availability Group.
Use the the listener IP address to register and monitor an Always On or AG database.
Note: When first registering the AG or Availability Group, DPA sees the physical IP address of the host where the AG is primary.
When the AG fails over to another host, the DPA monitoring will follow the listener and continue monitoring.
Note: As you monitor at the instance level, there may be anomalies seen as to databases monitored (the same databases may not exist in the SQL instance on node A as node B). DPA currently does not limit databases it monitors within any given instance.
After the instance is registered, configure DPA to connect to the AG through the listener IP address: