Provide them with your Account ID, the specific Activation Code, and a brief explanation that you are rebuilding an air-gapped system. They can manually clear the hardware lock on the backend for you.
This manually frees up your license for reuse. nessus offline activation license already in use
To resolve this, you must in the Tenable Community. This action breaks the link between your license and the "old" machine, allowing you to use the same code on the new/current machine. Step 1: Access the Tenable Community Log in to the Tenable Community. Provide them with your Account ID, the specific
: Download the new nessus.license file and register it on the offline system using: nessuscli fetch --register-offline . To resolve this, you must in the Tenable Community
Nessus uses timestamps as part of its license validation mechanism. Configure your systems to use NTP (Network Time Protocol) and verify that time synchronization is functioning correctly. Time discrepancies of even a few minutes can trigger activation failures.
To help me provide more specific steps, could you tell me your offline Nessus is installed on, and whether you are using Nessus Professional or Nessus Essentials ? Share public link