Duo Network Gateway RDP Issues

I am trying to relay RDP through a Duo Network Gateway. I have it set up to go through my HAProxy load balancer to my DNG on my server farm.

I can see traffic hitting my load balancer when I access it via a web browser, but not when I try to connect via RDP.

Support is saying my NS record is the problem. I have recreated the NS record and am waiting for DNS to propagate.

Are there any logs I can examine that might help me resolve this?