Active Directory Authentication Failure

Products

• CA Identity Suite

Issue/Introduction

I am trying to enable the Active Directory authentication module, but I get the generic error: 

Error: AD Internal Error:Check AD

I have checked for possible typing mistakes, i've imported the certificate to the appliance and checked both SSL and non SSL connection but no luck

Environment

Release : 14.4

Resolution

This issue was caused by one server in the vApp cluster having the proper certificate, and one server not having the certificate.