Please note that during the SARS-CoV-2 pandemic, we have been updating our academic license validation rules when restrictions limited access to university campuses. We recently returned to our previous validation rules requiring users to be on an academic network to validate their licenses, so you may encounter this error when you didn't previously.
While setting up an academic license file via grbgetkey, you may receive the following error message:
error : ERROR 303: hostname <host> (<IP address>) not recognized as belonging to an academic domain
info : Is your computer connected to the university network?
This error means your domain isn't on our academic domain list. For details on how to resolve this issue, please see How do I resolve an "ERROR 303" from grbgetkey?.