AD DNS Entries reappear after deletion

Question

Recently demoted a domain controller DC1, and now only one domain controller DC2 exists in the domain.
No other DNS servers exist in the environment, all FSMO roles are on the remaining DC2 (2012 R2)

DCDIAG is clean except for one warning:
Starting test: SystemLog
A warning event occurred. EventID: 0x00000458
Time Generated: 01/21/2022 12:33:45
Event String:
The Group Policy Client Side Extension Folder Redirection was unable
to apply one or more settings because the changes must be processed before syst
em startup or user logon. The system will wait for Group Policy processing to fi
nish completely before the next startup or logon for this user, and this may res
ult in slow startup and boot performance.
......................... DC2 passed test SystemLog

Any Ideas?

Answer 1

dcdiag will report the last 24 hrs of system event logs so this one may no longer be active. Check the system event log directly to confirm.

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Answer 2

Hi there,

Maybe the LDAP policy is causing this. This wiki will walk you through how to fix this is

Active Directory: Converting DNS "A" Record From Lowercase to Uppercase
http://social.technet.microsoft.com/wiki/contents/articles/16583.converting-dns-a-record-from-lowercase-to-uppercase.aspx

Here is a thread as well that discusses the same issue and you can try out some troubleshooting steps from this and see if that helps you to sort the Issue.

Deleted DNS records keep coming back
https://social.technet.microsoft.com/Forums/ie/en-US/bc5e21fc-6e23-4d50-beaf-110185f7e275/deleted-dns-record-keep-coming-back?forum=winserverDS

2 phantom DNS records keep showing up even after I delete them
https://social.technet.microsoft.com/Forums/windowsserver/en-US/66f2aad8-1272-43b4-add3-bbe2d4182cda/2-phantom-dns-records-keep-showing-up-even-after-i-delete-them

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