@Bruce , your Link does not work, but probably it's this statement:
An AnyConnect Plus termed license will be required to use AnyConnect on the MX when MX16.X firmware goes GA. Until that time, if an MX upgrades to MX16, AnyConnect will be available as an option. If a license is not linked when MX16 goes GA, AnyConnect will become unusable until a license is applied. More details on applying licenses will be available soon.
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