UMP LDAP login was showing this error in the portal.log.
javax.security.auth.login.FailedLoginException: No origin.
UMP/UIM 8.1, 8.2 and 8.31
ACL's were showing an error when we tried to open them from Infrastructure Manager
Copy the Administrator ACL and then assigned the new ACL to an LDAP group. At this point authentication to both UMP and IM worked using LDAP. UMP is configured to use screenName in the portal-ext.properties file.