<database name> is a DAG passive database not in Healthy state -- skipping.
A request was made to back up a Database Availability Group (DAG) passive database. The DAG passive database is not in a Healthy state. In order to back up a DAG passive database, it must be in a Healthy state.
Processing continues, but the specified database is skipped.
Ensure that the DAG passive database is in a Healthy state and retry the backup operation.