Rancher Connection to Active Directory Server

I am at a loss, basically what I am trying to accomplish is Access Control via Active Directory. The Active Directory is being handled by a Univention Server (4.4-4), but when I attempt to connect via the Rancher Web UI, I get the following message.

Error creating ssl connection: LDAP Result Code 200 "": x509: certificate signed by unknown authority

I’ve generated certs from UCS, and I’ve uploaded them into Rancher / Infrastructure / Certificates.

I’ve searched many forums, and online posts, and really just looking for some assistances.