Where Does Windows DHCP Store Its Database?
The DHCP server keeps leases in dhcp.mdb under C:\Windows\System32\dhcp, with automatic backups beside it.
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Windows DHCP persists leases and reservations in dhcp.mdb inside C:\Windows\System32\dhcp. A backup subfolder holds rolling copies the service writes on its own schedule. Scope definitions replicate from this same store.
Reconcile from the console when the display disagrees with reality. That check compares the registry view against the mdb file. Restore by stopping the service, swapping files, and starting it again during a quiet window.
Where Windows stores this, by platform
C:\Windows\System32\dhcp
dhcp.mdb holds leases with a backup folder beside it. Reconcile in the console before manual edits. Stop the service to restore files safely.
Frequently asked questions
How do I back up Windows DHCP?
Copy the dhcp folder with the service stopped, or export with netsh dhcp for a portable text form. The console backup command wraps the same files. Keep scope docs with the backup.
Why do leases disagree with the console?
The display caches while the mdb holds truth. Run reconcile to resync the views. Restart the service when reconcile alone leaves ghosts.
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