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Expected Behaviour:
When using Pi-hole with Cloudflare as a DNS forwarder in my Windows domain, it should show that DNSSEC is functioning and validating requests from my Windows 10 and Server 2012r2 clients.
Actual Behaviour:
Tests on Cloudflare Browser Check and http://dnssec.vs.uni-due.de/ show that DNSSEC is not working and fails validation on Windows clients when the client's DNS is pointed to my Windows Server 2012r2 DC. The DC is running DNS and the Pi-hole is set to be the forwarder. If I point a workstation directly to the Pi-hole for DNS, DNSSEC functions as expected and passes the validation tests.