The easiest way is to edit the citation (right click) more and put the text with cited pages in the suffix, not the pages line. –
Otherwise you need to edit the output style citation template to include “Cited Pages” as a field. I did that in the attached version, but you need to open and save this and then change the output style in the word processing program (not in Endnote program). You will probably need to view all styles to find it after saying as it won’t appear automatically in the dropdown, until you select it.