In the Cisco ISE GUI, click the Menu icon () and choose Administration > System > Licensing.

In the Licensing window that is displayed, click Registration Details.

In the Registration Details area that is displayed, enter the registration token that you received from CSSM, in the Registration Token field.

Choose a connection method from the Connection Method drop-down list:

• Direct HTTPS if you have configured a direct connection to the Internet.
• HTTPS Proxy if you do not have a direct connection to the Internet and need to use a proxy server. (If you change your proxy server configuration after you register Cisco ISE Smart Licenses, you must update your Smart Licenses configuration in the Licensing window. Cisco ISE establishes a connection with the CSSM using the updated proxy server, avoiding disruption of Cisco ISE services.)
• Transport Gateway is the recommended option. If you have configured a Transport Gateway, this connection is chosen by default. To choose another connection method, you must remove the Transport Gateway configuration.
• SSM On-Prem Server to connect to the configured SSM on-prem server. This option is available in Cisco ISE Release 3.0 Patch 2 and later. See Smart Licensing for Air-Gapped Networks.

In the Tier and Virtual Appliance areas, check the check boxes for all the licenses you need to enable. The chosen licenses are activated and their consumption is tracked by CSSM. Click Register.