Ask Secure Message a question. Answers come from this site's docs only. I will cite a page. I will not invent a product claim.
Each Secure Message license is locked to the appliance it runs on, so we issue the key once you can tell us the appliance's node ID.
The gateway prints its node ID during setup and shows it on the licensing screen of the admin console. It's unique to that install — activating a second appliance uses another seat on the same code.
Your codes are listed in your account, or you can use the activation page directly. Still stuck? support@secure-message.io.
Re-submitting the same code and node ID is safe — it returns the existing key and does not consume another seat.