DNS and DHCP are working nicely. Host names show up in the DNS and
addr.arpa records.

However, when a lease expires, the dns records are not automatically deleted. Bogus computer names used for testing stay in the DNS record

even though they have not existed for months. Also seeing a lot of
dynamic addresses that are very old. I am using a one day lease and
addresses are last used three or four months ago.

Any suggestions to make expired leases delete the DHCP address and DNS

records that were auto created?