Issue with DNS records not updating

Question

I am running Server 2016/2019 DC's. DCs are located in 4 different offices connected by vpn connections. All servers are in the same domain.
DNS is AD integrated. All DCs run dhcp and dns.
I have two DC's in the main office and one DC in remote_office1, remote_office2, and remote_office3.
Issue: Earlier this week I went to remote_office3 and did some work with my laptop. The next day I returned to the main office. I needed to scan a document to my laptop and after it failed I troubleshot and found out the reason was because my laptop was still in DNS with a pointer record from the subnet in remote_office3. I have seen this happen before and I am not completely sure there is anything wrong. My dhcp servers, on the DNS tab, have the options set for "always dynamically update dns records, and discard a and ptr records when the lease is deleted".
This problem does not happen very often as people work out of the same office most times. What do I need to do to make sure I have everything setup properly and how can I make DNS records update quicker or what can I do to make this work more smoothly for when someone goes from office to office? Thanks for the help

Answer 1

@TomG Hi,

Thank you for posting in Q&A!

I want to confirm the following information first:
1.do the DC with problem enable secure only dynamic update?

2.do the DHCP server update the PTR record or the client itself?

Usually, the DHCP server will update the PTR record. If PTR record fail to update, please check the following things:
1.For secure dynamic update, please verify if the DHCP server's computer account was added in DnsUpdateProxy in ADUC or if the DHCP credentials was configured on DHCP server.

2.Please try to enable this option in the Advanced TCP/IP settings of the client.

3.Please try to enable the aging and scavaging in DNS settings.

There's a similar case, please refer to:
https://learn.microsoft.com/en-us/answers/questions/128509/dynamic-a-records-of-clients-can-be-created-well-b.html

Hope you have a nice day : )
Gloria

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Answer 2

I remoted to the DC in remote_office3 and removed the dhcp entry DNS pointer entry for my laptop and now DNS has synced up on all 5 DC's and the pointer for my laptop is now correctly showing it located at the main office network. Not sure if it is now working correctly or if this will happen again the next time someone travels between offices. If someone can shed a little light on this it would be great.

Answer 3

DNS with a pointer record from the subnet in remote_office3

Did you check other domain controllers or just this one?

Answer 4

Yes, I checked other DC's and some of them had the old DNS entry for my laptop. I deleted old the pointer record on each server. I don't remember which one's.
I think I understand what you are asking.

Answer 5

If the domain controller for the site you connected to was updated but others were not then it may be a site replication issue, otherwise it may be some registration problem.

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