In EndNote, go to the Edit menu > Preferences (on a Mac, EndNote menu > Preferences)
In the Find Full Text section, add this to the OpenURL Path box: https://libkey.io/libraries/3137/openurl
Click the OK button.
You can now right-click on any reference in the central list part of EndNote, and select OpenURL Link from the context menu.
It will attempt to link you to a full-text version of the article in your web browser.