Sensor install failing, error log indicates proxy issue

Hi Everyone,

I was re-installing a sensor that was stuck on updates and I get an error in the logs -

failed connecting to service. The issue can be caused by a transparent proxy configuration

From what I can find that's related to either missing certificates or SSL inspection.  The proxy works fine for other sensors and I know it's not inspecting this traffic anyway.  I found a troubleshooting page that calls out the specific Root CA - "DigiCert Global Root G2" which exists on this machine.

https://learn.microsoft.com/en-us/defender-for-identity/troubleshooting-known-issues#proxy-authentication-problem-presents-as-a-connection-error

I believe this sChannel error is related

The remote server has requested SSL client authentication, but no suitable client certificate could be found.

I am stumped at this point, any help is appreciated.