When trying to perform mapping you may receive below error:
Map operation aborted. Details: An Error occurred while import from cn=accounts,OS400-SYS=SERVER.NAME.LOCAL An error occurred while executing search:"size limit was exceeded"
The LDAP implementation for AS/400 defines a limit of 500 search results (by default). If your AS/400 LDAP server has more than 500 records (e.g. users or groups) in the database you should increase the 'sizelimit' value in the slapd.conf file on your AS/400 as required.