How Do You Fix an A Record in Active Directory That Has Two Domain Names?

Problem scenario
You added an A Record to DNS in Active Directory. You accidentally added the FQDN and the parent domain name was added. Now the A Record is too long and has a duplicative domain name like this:

You tried modifying the FQDN in the A record, but it was immutable. What should you do?

Try waiting one hour. This problem may correct itself. It is possible that A.D. will notice it and fix it.

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