By default, all DNS files are stored in C:\windows\system32\dns. Incremental backups should catch any changes made to these files. If you have enabled dynamic updates to DNS, you quite often see this file change. After you have restored the operating system on your server, ensure that the DNS server is indeed installed. If it wasn't installed during your last backup, you can perform a reinstall by using the Configure Your Server Wizard. Accept all defaults on this wizard, which are of little consequence anyway because you overwrite the configuration files with backups.

After you have verified that the DNS server is installed and running, you need only restore all *.dns files from your backup media. After you have restored these files, shut down the DNS server and restart it to see the configuration changes.

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