A Legacy Entitlement Key provides the same coverage as ExtremeCloud IQ Pilot. If you do not have enough Pilot licenses to cover your devices, you can use a Legacy Entitlement Key. The differences between an ExtremeCloud IQ Pilot license and an ExtremeCloud IQ Legacy Entitlement Key are as follows:
ExtremeCloud IQ Pilot licenses in the license pool can be shared with multiple ExtremeCloud IQ accounts, while Legacy Entitlement Keys are assigned to a specific ExtremeCloud IQ account. Also, Legacy Entitlement Keys are no longer available for purchase.