Magnolia 5.3 reached end of life on June 30, 2017. This branch is no longer supported, see End-of-life policy.
AdminCentral is a legacy term carried over from older versions of Magnolia. AdminCentral is the back office interface for interacting with Magnolia and configuring all its functionality.
Download the UI Admincentral module from our Nexus repository.
UI Admincentralis a Community Edition module. It is typically already installed. Launch the Configuration app and go to /modules/ui-admincentral
to check.