The DNS server has been reconfigured to boot from a boot file. Current server and zone configuration information has been ...

The DNS server has been reconfigured to boot from a boot file.  Current server and zone configuration information has been written to this file. 
To return to booting from the registry or Active Directory, use the DNS console and reconfigure the boot method for the server.  For more information, see "To change the boot method used by the DNS server" in the online Help.