After looking at Lawson's ESS and MSS Security Classes in the provided role templates, it appears that these are only for use with EMSS users that do not have access to the search bar as they provide access to many forms and files that many users with the search bar should not have access to.
Has anyone any good suggestions on how to approach EMSS on LS9 for users hat have access to the search bar?
With LS Security a user has nothing by default whereas LAUA security gives everything by default. So theoretically as long as your Security Classes and Roles are defined well then there shouldn't be an issue giving the Search Bar.