I've done a fairly simple test using the latest Ubuntu 18.04 and can confirm that with "ad_use_ldaps = True" set in sssd.conf, sssd appears to only be making connections over ports 636 & 3269.
I've done a fairly simple test using the latest Ubuntu 18.04 and can confirm that with "ad_use_ldaps = True" set in sssd.conf, sssd appears to only be making connections over ports 636 & 3269.