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Export DNS records from one domain controller to another.

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Last Modified: 2020-01-22
I have to two 2012 domain controllers (DC1 and DC2) in the same Forest under the same domain. A child domain was added. following the addition of the child domain controller (DC3) DNS records on DC2 disappeared and took only the entries from the child domain. How do I reverse this process. DC1 is good and I exported the entries but when I try to import them into DC2 using dnscmd it gave me the DNS error record already exists.  How can I safely copy/export/replicate DNS records from DC1 to DC2?
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