To perform a backup on an HA cluster you specify one or more coordinators managing that cluster.

# Performing a full backup from HA cluster, specifying two possible coordinators
./neo4j-backup -full -from ha://192.168.1.15:2181,192.168.1.16:2181 -to /mnt/backup/neo4j-backup

# Performing an incremental backup from HA cluster, specifying only one coordinator
./neo4j-backup -incremental -from ha://192.168.1.15:2181 -to /mnt/backup/neo4j-backup