Why are DHCP leases not included in DHCP Log

Can someone please tell me why the Security Log doesn't know the IP address of people trying to log in and failing?

Here is the cause for something like Remote Desktop.

http://cyberarms.net/security-insights/security-lab/remote-desktop-logging-of-ip-address-%28security-event-log-4625%29.aspx

There is no option in Windows to enable or disable the logging of IP address, at least not to my knowledge.

For Remote Desktop I discovered that going into "Remote Desktop Session Host Configuration" and changing the RDP-TCP connection to have the security layer of "RDP Security Layer" instead of "Negotiate" or "SSL (TLS 1.0)" brought back the IP addresses.

Whether you really want to do this is another question for you, "If you select RDP Security Layer, you cannot use Network Level Authentication."

Terrible reason: I needed to close the Event Viewer and re-open. That's completely insane. Thanks for help.