DHCP and error 20287 out of available ip addresses

jus copl 6 Reputation points

Hey all,

Two 2019 servers. Both domain controllers, with dhcp/dns etc. Failover in Hot Standby mode.

Attempting to connect a pc to one of our scopes it wasn't being given an IP address. Errors on DC:
Error 20287 DHCP client request from B0C090A4835A was dropped since the applicable IP address ranges in scope/superscope Civic - IT are out of available IP addresses. This could be because of IP address ranges of a policy being out of available IP addresses.

Details for scope:
192. 168.66.1 to
Excluded to 100
Excluded to 254
No reservations.
There are 24 leases on the main and 3 leases listed on the failover. Statistics show 142 of 149 ip's in use!

Can anyone explain the discrepancy between the statistics?



Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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