My R730xd has the network daughter board with 2x 1Gbps RJ45 (Intel I350) and 2x 10Gbps SPF+ (Intel x520). The Unifi USW-24-POE has 2x 1Gbps SPF ports. I purchased custom DAC cables from Fiber Store with one end programmed Intel and other end programmed Ubiquiti. I connected the intel end to the server and the Ubiquiti end to the switch and nothing is connecting.

No SFP lights flashing on the server or switch. No connection shown in iDRAC or Unifi Controller. This is my first foray into SFP connectors so I hope I'm missing something simple. I know there's a SFP / SFP+ mismatch but I think intel x520 can handle backward compatibility.