751e44c4__Error_Codes___ServiceNow_Wiki__Description
[Error / Data Code] 34 [Error] LDAP_INVALID_DN_SYNTAX [Description] 
Indicates that the syntax of the DN is incorrect. (If the DN syntax is correct, but the LDAP server's structure rules do not permit the operation, the server returns LDAP_UNWILLING_TO_PERFORM.)
LDAP Error Codes - ServiceNow Wiki
Description