Which source is the most reliable for collecting User-ID user mapping?

Which source is the most reliable for collecting User-ID user mapping?
A . GlobalProtect
B. Microsoft Active Directory
C. Microsoft Exchange
D. Syslog Listener

Answer: A

Explanation:

User-ID is a feature that enables you to identify and control users on your network based on their usernames instead of their IP addresses1. User mapping is the process of mapping IP addresses to usernames using various sources of information1. The most reliable source for collecting User-ID user mapping is GlobalProtect2.

GlobalProtect is a solution that provides secure access to your network and resources from anywhere. GlobalProtect agents on endpoints send user mapping information directly to the firewall or Panorama, which eliminates the need for probing other sources2 . GlobalProtect also supports dynamic IP address changes and roaming users2.