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Follow these steps to troubleshoot local DNS resolution failures when setup with the Windows Roaming Client. 

Beginning with the release of Windows Remote Client 1.11.0, EDNS was added to local domain queries for failover. 

After upgrading to version 1.11.0, if local DNS resolution is failing the likely cause is that either EDNS isn't supported, such as with Windows 2012/R2 (no longer supported by Microsoft), or that a firewall is blocking EDNS queries.

Follow these steps to resolve the issue.

1. Add a registry entry to disable EDNS for local domain queries for failover
   

   • reg add “HKLM\Software\DNSFilter\Agent” /v IncludeLocalResolversEdnsRecords /d “false” /f

   • reg add “HKLM\Software\DNSAgent\Agent” /v IncludeLocalResolversEdnsRecords /d “false” /f

2. Restart the machine or DNSFilter Roaming Client to apply the change

✍️ To reenable EDNS for local domain queries for failover, set the registry value to true.