I have a dhcp server that is 4.10 and have another 5.1 server with SP8
trying to get to the dhcp 4.10 server. I get the following error on the
dhcp 4.10 server: Incoming request denied (deleteduplicate) mode of
operation). This was working before i applied SP8. Also it seems that
the 5.1 server is sending a request every 2 seconds to the dhcp server.
Any help would be appreciated.

Thank you