Dhcp is not updating dns

Still having problems with outdated records :-/I increased the lease time from 1 day to 7 days as mentioned in the OP, but we're still getting an issue when the clients receive a new IP, they are not updating DNS with the new record and removing the old.

Discard A and PTR records when lease is deleted Dynamically update for DHCP clients that do not request updates Our domain's zone is configured as an AD-Integrated zone with replication to all DNS servers in the forest.

After checking every possible reason of DHCP not taking care Dynamic DNS updates...

it turns out that there is a memory leak on the dhcp service when DDNS is enabled on that Server.

Discard A and PTR records when lease is deleted Dynamically update for DHCP clients that do not request updates As far as my understanding goes (which is clearly not far enough), DHCP should update DNS as soon as it itself updates.

Our DHCP was set to lease addresses for 1 day, for reasons which were never explained to me.

I did a bit of reading and discovered that the group should have DNS computer accounts in, if the zones are configured to only be updated securely - which they were. I am forever getting incorrect / outdated lookups when connecting to machines.Under the SOA tab, the refresh interval is 15 minutes, retry is 10, and the expiration is 1 day. There are no DNS events in the log which suggest that something is set up wrong.DHCP is set as follows: Enable DNS dynamic updates - always dynamically update DNS A and PTR records.I also read that a service account should be configured to carry out the zone updates - which I have now done. Our domain's zone is configured as an AD-Integrated zone with replication to all DNS servers in the forest.Dynamic updates are set to Secure Only, and Aging is 2 hours no-refresh, 6 hours refresh intervals.

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