In Policies > Web Authentication, set Identity provider URL to https://AdvancedAuthenticationServerAddress/ and replace AdvancedAuthenticationServerAddress with domain name or IP address of your Advanced Authentication server.
NOTE:To use multiple Advanced Authentication servers with SAML 2.0, you must do the following:
Configure an external load balancer.
Specify the address in Identity provider URL instead of specifying an address of a single Advanced Authentication server.