We recently switched from Brocade to Cisco C9410R also added new DHCP scope for users. I made sure DHCP, DNS and DC are setup correctly, but we can't see any endpoints in UDT (we still have a few brocades online and they work fine).
I used the UDT compatibility checker and it showed "auth errors" for some MIBs.

but my Network Engineer tells me the switch is setup correctly it should be able to read all global MIBs. So we opened ticket with Cisco they had us do a SNMPwalk, and it was in fact able to get all the MIBs I think.
So I'm not sure why was UDT comp check throwing errors. Opened a case with SW support, no response of yet.