Field help (ASSOPARAM2) 

the execution engine of the SAFE X3 platform uses 3 search instructions in the directory. This setup is used to define the search instruction that will be launched by the engine when checking the existence of a user in the LDAP database. It can take the following values:

An example of menu is given in the introduction of the technical appendix of the LDAP setup; in this example, 3 frameworks define these 3 levels of search.