Controller-less WLANs

Why is that the switches tab is missing from device management page of my Aruba Central account?

Aruba Central is a cloud-based platform that enables you to manage your Aruba Wi-Fi network. Designed as a software-as-a-service (SAAS) subscription, Central provides a standard web-based interface that allows you to configure and monitor Instant Access Points (IAPs) and Mobility Access Switches. 

Switches tab is available only when the end-user's aruba central account have the license to manage the switches. If only IAP license is available, then switches tab do not appear in device management page of Aruba Central.