Optiplex 7040 networking (NO DHCP)

Folks,
Has anyone else taken on the Optiplex 7040 desktop yet? Skylake issues (that should be resolved with RHEL 7.3) aside, I can't for the life of me get DHCP working against MS DHCP servers.

I've tried both RHEL 7.2 and Fedora workstation 24 to no avail. I can set static IP information in NetworkManager and that does just fine. The MS DHCP server doesn't seem to report anything from the MAC address in question (we use static reservations...)

I'm downloading Ubuntu 16.04 to test with now since it's already on their HCL w/ full Skylake support. The Windows image on the OEM hard drive works just fine to pull DHCP, also.