He spun his chair around to a separate, air-gapped laptop he used for testing. He copied the file via a USB stick. He ran the tool. A crude DOS window popped up.
Activation keys are unique to each server's and Serial Number (SN) .
The easiest way to activate your features is through the IMM web interface.
Find the "Integrated Management Module Advanced Upgrade" in the list and download the .key file. Step-by-Step: How to Install the Activation Key
The key is a in the format:
An (often referred to as a Feature on Demand – FoD key) is a unique, server-specific license code that upgrades your IMM from a basic management controller to an enterprise-grade remote management solution.