Hey Keith,
Im not an expert in harmony endpoint (more firewall guy), but one thing caught my eye when reviewing the log you pasted. Just curious, the line that gives the policy name says Default Firewall settings for the entire organization...to me, logically, that would equate to default implicit rule on regular firewall that would say any any block. Is there any way you can confirm rule(s) in that policy?
Again, apologies if it sounds like a dumb question, but just going based on my own logic here : - )
Andy
Best,
Andy
"Have a great day and if its not, change it"