To license RealVNC Server or Viewer without an internet connection, you must apply an offline license (usually a file or a long text string) obtained from the Deployment page RealVNC account portal How to Apply the Offline License
License key: XXXXX-XXXXX-XXXXX
Type: Offline (perpetual/expiry date)
Version 7.x Changes: Starting with VNC Connect 7.x, the system uses a license file/token rather than the legacy 25-character key used in version 6.x. vnc offline license file
Renewal: Offline licenses are generally valid for one year. When your subscription renews, you must manually apply a new offline license file to every machine to avoid losing access. To license RealVNC Server or Viewer without an
For example, a simplified offline license file might appear as (though actual files are binary or obfuscated JSON): Version 7
To help you get this set up correctly,g., macOS or Windows)?