Both EndNote Desktop and EndNote Online can work with Word to create bibliographies or insert references from your library into a Word document. You can then format the document into a citation style of your choice, e.g. Harvard, Vancouver. This facility is called Cite While You Write (CWYW).
See the section above, Using EndNote with Word, for details on how to use Cite While You Write.
To use EndNote Online with Word you need to install the Cite While you Write toolbar, if you do not already have it:
If you are already using Word with EndNote Desktop and you wish to switch using Word with EndNote Online: