I recently installed Icinga on Centos 7, and trying to set up active directory authentication with STARTTLS. I have the openldap properly configured, and the certs in place. However, when I create the backend, and I hit validate, about 50% of the time, it’s successful, and the other 50% it says “Unable to start TLS, connect error”. Any other application from the same server is able to authenticate against the AD without any issues. Can anyone please help me to solve this?