If you want to print and the server is offline, and you have selected Prompt for an address as the Fallback Printing option, a pop-up with job specifications and a field for entering an IP address/hostname is displayed:
Enter the printer’s IP address or hostname and click Print. The job is printed, and the following message is displayed, after which the job is deleted.
In case the job cannot be printed at the selected fallback printer, the following message is displayed:
Click Try again to try another printer.
Click Cancel to delete the job.