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Event ID: 20100 Source: DHCP-Server

Source
Level
Description
DHCP Services were denied to machine with hardware address <MAC address>, hardware type 1 and unspecified FQDN/Hostname because it did not match any entry in the Allow List.
Comments
 
Event logged in the Microsoft-Windows-DHCP Server Events/FilterNotifications when MAC filters is enabled in the IPV4 Properties. Add the needed MAC address or do not enable the MAC filters. See the suggestions related to event id 20097 - same source in ME2782375 and TF521761 (Enable and Configure MAC Address Filtering).

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