I have a floating Arnold Licence and I'm trying to send render jobs from Maya to Deadline using Arnold render but even after having the licence my renders still come out with a watermark. I think Deadline cannot find my Arnold licence because it can't connect to the RLM server. Any help would be appreciated. I've tryed disabling my firewall but that doesn't help.
Deadline doesn't connect to the license server, Arnold does.
Assuming you do have an RLM license, and not an Autodesk license, all you need to do is 1) set solidangle_LICENSE and 2) make sure the Deadline services pick up the new environment variable settting.
Then check the Arnold log for a render. There's section about licensing.