Hi,
MM license is different than other MC or AP etc licenses.
as per AOS and Aruba, you have to purchase the below license to implement your wireless.
MM license: MM license is required to support the controller or APs on Mobility master
AP license: This license is required for each AP to terminate it on Controller and advertise your BSSID.
PEF license: Each operational AP, which use policy enforcement consume one PEF license.
RFprotect license: this license is required for each operational AP using below features like AM, SM, WIP, and MultiZone.
apart from above if you need other license based on your need you can try VIA for VPN, WebCC for web security and ACR its for advanced cryptography.
Best Regards,
Sureshreddy