Thanks.
I'm running a SonicWALL firewall and it is set to assign the IP address of an incoming client from the same server mentioned above. It is not running DHCP. There is one other serve on the network (Backup DC) with DHCP Server not running. I have one Wireless AP, no DHCP running
The thing is that this happens VERY intermittently, and all at once. For example, the last time before this time it was back in early June. Also, make note of the "unique ID", that is not a Mac address like the others, and they are all similar. This last time there were only maybe 5 people in the office (COVID) and it started up ~09:30, when those people were coming in. I'm remote. My in-office contact told me that he restarted the Comcast router when a couple of people were having connection issues. He is not technical and that is his go-to response. The issue did seem to go away after that.
My point being, all these variables are constant, why is the problem intermittent and rare?