The following document says that miqldap is being deprecated in ManageIQ G release and that external auth is the preferred method. http://manageiq.org/blog/2018/02/auth-overview/ I don't see any mention of LDAP/LDAPS authentication being deprecated or external auth being preferred in the CloudForms Managing Authentication documentation: https://access.redhat.com/documentation/en-us/red_hat_cloudforms/4.6/html-single/managing_authentication_for_cloudforms/