: Move the activation.tlf back to the offline computer. In the same activation dialog, select the Open or Import option and point to the .tlf file.
Always execute a formal deactivation routine before modifying server infrastructure to prevent license locking. When upgrading Tableau Server in an exclusive network, ensure your keys are updated using the same offline exchange process before initiating the software installer. To help tailor these steps further, let me know: offline activation tableau exclusive