Transform map coalesce field is not matching existing records correctly, causing the system to skip record creation when it should create new users or update existing ones. (high likelihood)
LDAP query filter is too restrictive and excludes users that should be imported, or the query syntax contains errors that silently filter out records. (high likelihood)
Required field mappings are missing or incorrect in the transform map, causing record creation to fail validation without generating obvious error messages. (medium likelihood)
Business rules or ACLs on the sys_user table are preventing record creation during the import process, particularly those that run on insert operations. (medium likelihood)
The LDAP server connection or authentication failed during the sync, but the import process continued and appeared successful while actually retrieving no data. (low likelihood)