Log in to your RealVNC account portal from a machine with internet access.
Once your request is processed, you will receive the offline license file. This file might need to be manually placed in a specific directory where the VNC software can find it. vnc offline license file
Ensure that your offline license file does not expire. Some licenses might have a validity period. Log in to your RealVNC account portal from
Navigate to the RealVNC Administrative Templates and paste the license key into the Licensing setting. vnc offline license file
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