If you have the base serivce and feature keys already installed on an appliance - you can simply contact GLO and request them to provide the CM feature key as well. This should be at no charge.
Each appliance have to have an assigned key, and have it tied in the keys/license DB.
Please contact our Global Licensing Operations team:
https://tools.cisco.com/SWIFT/LicensingUI/Home
Licensing FAQ
Phone: 1-800-553-2447, opt 3
Request to have a case opened for GLO/Licensing.
Their email directly is: licensing@cisco.com
You would be needing to have the following key added:
Centralized Management: ESA-CM-LIC=
Hope this helps!
-Robert
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