Jean Franco,
This message means that the Provisioning Server is trying to connect to the AD Domain Controller using SSL.
As a first step, to make sure you have connectivity and can see the details from the end point, open the endpoint properties, and then click on teh security tab.
What probably have the "Use LDAP - SSL encryption" selected.
Select the "Do not use SSL" radio button and save the change.
Try to connect again.
If your AD supports connections which are not encrypted, there will be no problem;
I am attaching a screenshot for your convenience.
Once you have the endpoint setup you can then test using SSL.
My guess is that either the AD is not setup correctly to handle SSL or the certificate was not imported correctly to the provisioning sever.
If you still encounter difficulties, please feel free to open a support case.