By default, domains created in the hosting server use the DNS server for name resolution. However, in some situations this is not desirable. For example, if you are using a third-party DNS server or servers that are authoritative for your domain, it is recommended to disable the DNS service for the domain. To do so, go to Websites & Domains > DNS Settings and click Disable. If, at a later time, you change your mind, click Enable to switch the DNS service for the domain back on.
While the DNS service for a domain is disabled, you can check whether the DNS records stored on the third-party DNS server are correct. To do so, go to Websites & Domains > DNS Settings, click Add Record, type in the domain name of the third-party DNS server, and click the icon next to the name of the DNS server you have just added. The hosting server will retrieve the list of DNS records from the third-party DNS server, compare them to the DNS records for the domain stored in the database, and warn you of any discrepancies.