The Admin GUI can be reached from either a separate url or as a tab within the officer GUI, this is configured in the configuration file config.js for the GUI. The administrator has to be given the proper subset of privileges to be able to access the Admin GUI.
The administrator needs a smart card with trusted user certificates to be able to logon to the Admin GUI. If the administrator has multiple certificates on the smart card a certificate selection has to be made. It is possible to configure if the logon certificate has to contain certain fields in the certificate subject to avoid the selection. The configuration is done in the configuration file config.js for the GUI.