An engineer needs to collect User-ID mappings from the company's existing proxies. What two methods can be used to pull this data from third party proxies? (Choose two.)

Third-party proxies can be configured to send Syslog messages containing user-to-IP address mappings to the Palo Alto Networks firewall, allowing the firewall to build its User-ID table.

When traffic passes through a proxy, the proxy can insert an X-Forwarded-For (XFF) header into the HTTP request, which contains the original client's IP address, enabling the firewall to map this IP to a user if authenticated by the proxy.

Client probing is a User-ID method where the firewall actively queries client devices or authentication services directly, not a mechanism for retrieving data from proxy servers.

Server Monitoring in the context of User-ID typically refers to monitoring authentication servers like Active Directory or eDirectory for login events, not for pulling user mappings from proxy servers.