Nessus Offline Activation License Already In Use [exclusive] Now

Open your terminal and run the following command as root or via sudo : /opt/nessus/sbin/nessuscli fetch --challenge Use code with caution. On Windows

Locate the specific Nessus license key that is throwing the error.

Open the terminal (Linux) or command prompt (Windows) on your . Navigate to the Nessus directory and run: nessuscli fetch --challenge Use code with caution. This command will produce a Challenge Code and a URL . Step 2: Get License File ( nessus.license ) nessus offline activation license already in use

C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --register-offline C:\path\to\nessus.license Common Troubleshooting

When performing an offline activation of Tenable Nessus, encountering the error typically means your license is currently bound to another host. Nessus licenses (Essentials, Professional, and Expert) can only be active on one scanner at a time . Open your terminal and run the following command

To avoid encountering the "Nessus Offline Activation License Already in Use" error in the future:

Open your terminal and run: /opt/nessus/sbin/nessuscli fetch --challenge Navigate to the Nessus directory and run: nessuscli

"C:\Program Files\Tenable\Nessus\nessuscli.exe" fetch --register-offline nessus.license Use code with caution.

: If you still have access to the "old" machine, you can try deactivating it directly using nessuscli fetch --deactivate to free up the license.