Intel NIC firmware updates that work with 2K16 please!!

We have Secure Boot enabled in our environment as a standard, but we also have some PowerEdge M630s with Intel X520 Mezz cards installed whose firmware is old enough not to have a signed boot ROM, which means that every single time those servers reboot, they halt on a Secure Boot warning about the NIC's untrusted firmware. The fix is of course to update the firmware, but even the latest updates available on support.dell.com for the X520 and X710, both released in the last 1-2 weeks, do not run on Windows Server 2016 -- even though they're listed in the Drivers and Downloads page after I select Server 2016 as my OS.  The updates instead immediately fail with an "Inventory Collection Failed" error, and when I extract the update contained in the Dell package to run the underlying file directly and dig through the logs it generates, the root error mentions an unrecognized OS.  In our particular environment it isn't feasible to temporarily move these NICs into servers running an older OS in order to complete the update, nor will these firmware updates run from WinPE or even directly on the Lifecycle Controller.  Disabling Secure Boot also isn't a viable option, especially with no ETA on when the underlying problem will be resolved.

I'm not sure if this is a Dell issue or an Intel issue, but Windows Server 2016 has been out for a year now, and in fact Microsoft just announced the NEXT release called Windows Server 2016 Version 1709, which will be coming out this month or next, so there is absolutely no excuse for major OEMs like Dell and/or Intel to not fully support 2016 by now.