Extracting Windows Server 2003 Active Directory-integrated DNS zones to a file

If the DNS zone is a Standard Primary or Secondary zone, the information is already in a .DNS file at %SystemRoot%\System32\Dns.

To extract an Active Directory-integrated zone to a file:

dnscmd /ZoneExport FQDN_ZoneName FileName

Examples
dsncmd /ZoneExport ADMINOTES.COM ADMINNOTES.DNS
exports the ADMINNOTES.COM zone to %SystemRoot%\System32\Dns\ADMINNOTES.DNS.
dnscmd ADMINNOTES /ZoneExport test.ADMINNOTES.COM Test.DNS
exports the test.ADMINNOTES.COM zone on server Adminnotes to %SystemRoot%\System32\Dns\Test.DNS on ADMINNOTES