For more information on security, refer to the Security Guide.pdf in your Documents folder.
Help, Product Documents will open to the PDF Guide, you can then enter the page # you need, in this case, Page 53 has several helpful links for setting up and changing security, the Security section starts on page 38.
Note: If the item is still not accessible to the user, the item may have been turned off via Security Permissions by Type. Please see the attached article 37165 DocLink: Why can't a non-admin user access a task or report? (Tasks turned off in security) for more details.
DocLink: How do I set up or add a new user in Sage 300 Construction and Real estate?
DocLink: How do I set up or change security in Sage 300 Construction and Real Estate?
DocLink: How do I set up a new role in Security?
DocLink: Why can't a non-admin user access a task or report? (Tasks turned off in security)