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We want to have high availability for the external dns name server service. Prevent service down of Exchange or web service. Due to the security concerns, we do not have external dns server. All records at hosted by one service provider.<br />
<br />
But the network of that service provider is not stable recently. Is it possible to allow DNS records hosted by two different service provider to have high availablility? That is, if service provider A is down, service provider B can handle all service with least down time. <br />
<br />
Thank you.
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We want to have high availability for the external dns name server service. Prevent service down of Exchange or web service. Due to the security concerns, we do not have external dns server. All records at hosted by one service provider.

But the network of that service provider is not stable recently. Is it possible to allow DNS records hosted by two different service provider to have high availablility? That is, if service provider A is down, service provider B can handle all service with least down time. 

Thank you.

how to setup external DNS name server high avaibility?

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.