Enable DHCP server logging
1/ Start the DHCP MMC
2/ Select “properties” on your DHCP Server
3/ And select “Enable DHCP audit logging” checkbox
Now, you can browse %systemroot%\system32\dhcp directory.
A new file is created : DhcpSrvLog-XXX.log
example : DhcpSrvLog-Thu.log, DhcpSrvLog-Wed.log, …
You can also enable by PowerShell :
Set-DhcpServerAuditLog -Enable True -Path "C:\Windows\System32\dhcp" -MaxMBFileSize 50