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Event ID: 1012 Source: DhcpServer

The DHCP Client (000A12AC010010A4D07EB2) declined the address (
As per Microsoft: "Internet Protocol (IP) addresses are leased by the Dynamic Host Configuration Protocol (DHCP) server to its clients. Each lease has an expiration date, which the client must renew if it is going to continue to use that IP address. The DHCP server cannot issue leases to clients if the number of available IP addresses in the scope is insufficient". See the link to "TechNet Event ID 1012 - DHCP Lease Availability" for more details.
This message means that the DHCP server has received a DHCP request, offered an IP address to the client but the client declined it (this could be because the client has received already an IP address from another DHCP server).

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