Hello,
I would suggest contacting the Cisco Meraki Licensing Support team via phone or opening a case from the Support home page, so that they can verify and update you if your organization can be upgraded to Advanced Security or Secure SD-WAN Plus without purchasing additional licensing.
Any MX security appliance keys will be adjusted to account for cost weight between Enterprise and Advanced Security or Secure SD-WAN Plus. Please note that if going through Cisco Meraki Support, the process is irreversible.
URL - https://documentation.meraki.com/General_Administration/Licensing/Meraki_Licensing_FAQs
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