Delete a Client Lease
Applies To: Windows Server 2008
You can use this procedure to delete a client lease.
Membership in the Domain Admins group, or equivalent, is the minimum required to complete this procedure.
To delete a client lease
Open DHCP.
In the console tree, click Address Leases.
In the details pane, click the IP address of the client you want to delete.
On the Action menu, click Delete.
Make a reservation with the IP address, or exclude it from the range.
Force the client with the existing lease to give it up. At the command prompt on the client computer, type ipconfig /release.
If required, give the client a new IP address. At the command prompt on the client computer, type ipconfig /renew.
Additional considerations
If you want, you can cancel leases for all clients in the scope. To cancel all current leases, select all of the clients in Address Leases, right-click, and then click Delete.
Deleting a client lease does not prevent the server from offering that IP address again in a future client lease. It also does not prevent the client from requesting the address again, unless steps 5 to 7 are followed.