What does Windows error code 9996 (DNS_ERROR_POLICY_INVALID_CRITERIA_TIME_OF_DAY) mean?

 
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DNS_ERROR_POLICY_INVALID_CRITERIA_QUERY_TYPE WSAEINTR

DNS_ERROR_POLICY_INVALID_CRITERIA_TIME_OF_DAY

DNS_ERROR_POLICY_INVALID_CRITERIA_TIME_OF_DAY means the time-window condition in the DNS policy is not valid. Time-based routing or filtering depends on a precisely formatted, unambiguous time range.

What to verify

  • Review the time-of-day criterion syntax and verify the server clock, time zone, and time synchronization.
  • Check boundaries that cross midnight and make the intended behavior explicit.
  • Test immediately before and after the intended time window, not only during a single successful query.
Get-DnsServerQueryResolutionPolicy
Get-DnsServerQueryResolutionPolicy -ZoneName "example.com"
Get-DnsServerClientSubnet

Microsoft: Add-DnsServerQueryResolutionPolicy

Microsoft: DNS Policies overview

Microsoft: Get-DnsServerQueryResolutionPolicy

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