HTTP error 403.16 - client certificate trust issue

Question

I am trying to implement client certificate authentication on IIS 8. I have deployed my configuration on a development machine and verified it working as expected there. How

Answer 1

I got this error in IIS Express:

HTTP Error 403.16 - Forbidden

Your client certificate is either not trusted or is invalid.

Looking at the TraceLogFiles I saw the following error:

 MODULE_SET_RESPONSE_ERROR_STATUS
 
  RequestNotifications
 
 BEGIN_REQUEST
 A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.
(0x800b0109)

Turned out when I installed Razer Synapse the installation also put a certificate for chromasdk.io in Trusted Root Certification Authorities under Computer Account -> Local computer. I removed this and then everything worked.