You may notice your getting a lot of Windows Event related on your DHCP server for DhcpAdminEvents. One such error may be the following.
Basically, your redundant DHCP servers have fallen out of sync. These errors could also start to cause issues on your network your DHCP servers hand out IP addresses on and you may notice sporadic connectivity with clients. To fix, you must re-sync your DHCP servers.
Invoke-DhcpServerv4FailoverReplication
You will see a log of replicated scopes and a status message. This should re-sync your redundant DHCP servers.
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