Inserting citations and references into Word using EndNote is called 'Cite While you Write'. For this you need the EndNote toolbar in Word. The toolbar allows your EndNote Library and your Word document to 'talk' to each other. The toolbar looks like this:

You will see that 'EndNote 2025' is now one of the toolbar tabs.
Note: The 'EndNote 2025' tab is not the same as the 'References' tab. The References tab should not be used for referencing (but can be used for creating Table of Contents)
How do I get the EndNote toolbar?
If you are still having problems, please:
To make sure that your chosen style (e.g. 'Harvard HWU Cite Them Right') is visible in the EndNote toolbar in Word:
In EndNote
Got to:
or
In Word
Go to:
See also:
Watch this short video to see how the EndNote toolbar in Word works:
You add page numbers using 'Edit & Manage Citation(s)' in the EndNote toolbar in Word:
Click on the citation you wish to edit
In the ‘Edit Citation’ tab, we recommend that you insert page numbers in the ‘Suffix field in the format:
p. 23 for a single page or
pp. 26-36 for a page range
See Appendix A: How to enter/edit details into EndNote fields:
If you cannot see the style you need in your EndNote toolbar, see: