Hi,
Based on your description, your question is about AD DC and DNS, please post your question on Microsoft Q&A forum, with tag
windows-active-directory and
windows-dhcp-dns, relate product supporter will provide you detail suggestion:
https://docs.microsoft.com/en-us/answers/topics/windows-active-directory.html
https://docs.microsoft.com/en-us/answers/topics/windows-dhcp-dns.html
Thank you for your understanding.
Best Regards,
Eve Wang
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