Nessus Offline Activation License Already In Use < HOT >

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.

/opt/nessus/sbin/nessuscli fetch --register-offline nessus.license

If running Nessus in a VM, set a static MAC address. If the MAC address changes, the Challenge Code changes, and your license will break. nessus offline activation license already in use

The most direct way to resolve this is to reset your license through the Tenable Support Portal or the Tenable Community site. Log in to your account. Navigate to the Products or Licenses section.

The error occurs because Tenable's license server believes the code is currently active on another machine. Common causes include: If you followed these steps and still receive

You uninstalled Nessus and tried to reinstall it on the same machine, but the server didn't "release" the old hardware ID.

After the license is accepted, remember that you will also need to manually download and install the latest plugin set ( all-2.0.tar.gz ) since the machine has no internet access to pull them automatically. Pro-Tips for Avoiding Future License Issues If the MAC address changes, the Challenge Code

Open your terminal and run: /opt/nessus/sbin/nessuscli fetch --challenge