With your reset and your new Challenge Code in hand:
They will manually run a database query on Tenable’s backend to disassociate the activation code from the stale Challenge Code. This takes 24–48 hours for Standard support, 2–4 hours for Premium. nessus offline activation license already in use
: Reinstalling the OS or deleting a Nessus instance without first deactivating the license leaves the code "locked" to the old instance. Hostname Changes With your reset and your new Challenge Code
To avoid this issue in the future:
: Offline scanners cannot fetch plugins automatically. You must use the "Custom URL" provided during offline registration to download plugin TAR files manually on an online system and transfer them. nessus offline activation license already in use