Required properties:
remote:<string>- Remote ID.
remote-store:<string>- Datastore name.
store:<string>- Datastore name.
Optional properties:
comment:<string>- Comment (single line).
owner:<string>- Authentication ID
remove-vanished:<boolean> (default=true)- Delete vanished backups. This remove the local copy if the remote backup was deleted.
schedule:<calendar-event>- Run sync job at specified schedule.