Dell VRTC CMC User Directory Services

Hi

I want to get the CMC the use my Active Directory to Authenticate users. I have set it up with Microsoft Standard Schema but don't want to use Certificate validation so I have it unchecked but when I do  a test I get the following error. Any ideas? why it is failing?

[check]: (system) Verify needed system resources: PASSED
[check]: (setup) Validate AD configuration: PASSED
INFO - (setup) Using standard schema
INFO - (setup) SSL certificate check disabled
[check]: (setup) Verify SSL certificate files exist: FAILED
ERROR - (setup) SSL CA Certificate file missing
TEST FAILED