Places to check HA agent status
1.) In the Host List view for a cluster or datacenter, HA State column has been enabled. An HA state of “Running (Master)” indicates the host is serving as a vSphere HA master host. A state of “Connected (Slave)” indicates the host is serving as a vSphere HA slave host.
2.) In Cluster Status
3) This state is reported on the host’s Summary tab in the vSphere Client