For following Aruba best security practices, the setting you should change is to disable local authentication. When integrating with an external RADIUS server like ClearPass Policy Manager (CPPM) for authenticating administrative access to the Mobility Controller (MC), it is a best practice to rely on the external server rather than the local user database. This practice not only centralizes the management of user roles and access but also enhances security by leveraging CPPM's advanced authentication mechanisms.
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Aruba Networks official best practice documentation, which recommends centralized authentication for administrative access.
Security standards and guidelines that promote the use of external RADIUS servers for authentication purposes.