rdp unexpected response

I had to rebuild my xymon server. I had it running well for years, but it needed a nice upgrade and I did this a couple of months ago. However a lot of the custom configuration I don't remember and I can't find in google.
A lot of my rdp checks are getting Unexpected service response. I think most likely is because they have NLA (Network Level Authentication) selected.
Is there a way to check without changing that setting? Most of my servers do not require access to other users so I don't want to lower the setting. Maybe the setting needs to be updated?

David Hay-Currie
IT Manager
Leisure Fitness Equipment LLC
XXX Executive Dr. Suite XX
Newark, DE XXXXX
Phone: (XXX) XXX-XXXX
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