You will need to adjust the Author Name and Editor Name settings in the style you are using.
In EndNote you can go to Edit > Output Styles > Open Style Manager > locate the style you are using > Click Edit > go to Author Name under Footnotes > here change the Short Form setting for Initials to Full Name > you would need to do the same for Editor Name under Footnotes > here change the Short Form setting for Initials to Full Name > go To File > Save > close the style window.
You can then update your Word document by using the Update Citations and Bibliography command in Word.
The change should be applied to the document.