Nessus Offline Activation | License Already In Use

If you followed these steps and still receive the "Already in Use" error, it usually indicates a backend sync issue at Tenable. In this case, providing your Activation Code and the new Challenge Code to a Tenable Support ticket is the fastest path to resolution.

Open your terminal and run: /opt/nessus/sbin/nessuscli fetch --challenge nessus offline activation license already in use

Finalise the activation on the offline system by running the registration command: If you followed these steps and still receive

On an :

On your offline scanner, run the following command to get a unique identifier for that specific machine: nessus offline activation license already in use

C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --challenge macOS: /Library/Nessus/run/sbin/nessuscli fetch --challenge Copy the alphanumeric string provided. 3. Obtain the license file