Support policy for DNS client-side caching on DNS clients
Windows contains a client-side DNS cache. Microsoft doesn't recommend disabling DNS client-side caching on DNS clients. A configuration in which DNS client-side caching is disabled isn't supported.
Microsoft does not guarantee that a resolution will be found for issues that involve unsupported devices or configuration. If no resolution is found, the cost of an investigation into the incident is not refunded. If it is not agreed that a solution is not guaranteed, Microsoft Support will not fix the problem and will refund the cost of investigating the incident.