DNS Server dot deleting old records

First post here

I'm in a Domain in which we have two domain controllers and two DNS
servers (also WINS servers as Exchange 2003 was never fully tested
without it), also we are in native mode.

My problem is that we have an old bunch of records of all machines in
DNS, we have DHCP and the zone is configure for Dynamics update, so in
essence the old records should be delete it every 7 days cause
Scavenge is active.

I've search the web and I just found that the Scavenge should be
active in two places which we have but still the old records are
there.

I would like to know what can I do to eliminate this issue.

Note : I don't have any errors at my DNS Server Event Viewer.

Thank you

Verify that you have "Advanced" turned on within your dns server console,
which is under View toolbar on top. Check to see if these A records have
the check box selected "Delete this record hwen it becomes stale".

Yes, those records are checked for deletion after stale state

Scavenging alone will not delete old records or duplicates. Have you either
configured credentials for DHCP to use when registering records, or assuming
DHCP is on a DC, added the DHCP server to the DnsProxyUpdate group? Either
action in conjunction with *forcing* DHCP (DHCP properties, update all
records whether the client requests it or not), will make DHCP own the
record so it can update it, otherwise, DHCP can't update a record it does
not own. This is because by default. You may have to delete current
duplicate records until it gets caught up.

Read up on it in the following blog, please.

DHCP, Dynamic DNS Updates, Scavenging, static entries & timestamps, and the DnsProxyUpdate Group (How to remove duplicate DNS host records)

Let me thank you for the guide.

I'm trying to take advantage of this information.

But there something that I don't understand in the guide so I need
some clarification.

First I need to tell you that as I have my DHCP in another server
different than our DNS/Domain Controller I will Choose the option one,
so I should follow the below instructions as per article
Option 1:

1. Add the DHCP server to the DnsUpdateProxy Group.
2. Force DHCP to register all records, Forward and PTR, (whether a
client machine can do it or not) in the Option 081 tab (DHCP
properties, DNS tab).
3. Set Option 015 to the AD domain name (such as example.com).
4. Set Option 006 to only the internal DNS servers.
5. If the zone is set for Secure Updates Only, then DHCP cannot
update non-Microsoft clients and Microsoft clients that are not joined
to the domain. In this case, you will need to create and configure a
user account for use as credentials for DHCP to register such clients.

My problem is with the number 2 (Force DHCP to register all records,
Forward and PTR, (whether a client machine can do it or not) in the
Option 081 tab (DHCP properties, DNS tab). The Force DHCP to register
all records, Forward and PTR, is the one you get in the DHCP server
properties > DNS TAB > Always Dynamically Update DNS A and PTR records
but I get lost when talk about the option 081 tab, so what is that?

I even check in the Predefined Options and Values there isn't a 081
option.

Please somebody can help me here?

I thought you had resolved this by now. Your last post was on 12/4 last
year.

Actually, Option 081 is the DNS tab in DHCP properties. You will not
find it as a Server or Scope Option. Option 081 defines DNS Dynamic
Updates.

If DHCP is on a non-domain controller, go with the credentials method.
If DHCP is on a domain controller, go with either the credentials
method or the DnsProxyUpdate group method.