Ensure that PRISMAsync Remote Manager is enabled on all printers you want to add to the printer cluster.
Go to: [Preferences] → [System settings] → [Printing workflows] .
Use the [PRISMAsync Remote Manager] option to enable PRISMAsync Remote Manager.
PRISMAsync Remote Manager is enabled by default.
Learn about PRISMAsync Remote Manager
Learn about PRISMAsync Remote Manager printer clusters
Configure PRISMAsync Remote Manager printer clusters