The OpenURL feature in EndNote allows you to link from an EndNote reference to a complete full-text article owned by the library. To enable OpenURL:
1) In EndNote, go to the Edit menu and choose Preferences.....

2) Click Open URL (or OpenURL/PDF in later versions) at the bottom of the left-hand menu.
3) Make sure the Enable Open URL box is checked.
4) In the Open URL path box, delete any current information and enter the following URL:
http://mulibraries.1cate.com/missouri/resolver/default.asp?action=cite
(or http://mulibraries.1cate.com in EndNote X/X1)
5) Click OK .

You only have to enable the OpenURL feature once. To use the OpenURL feature thereafter:
1) Open an EndNote reference (i.e., double click on a reference).
2) From References menu, choose OpenURL Link .
3) A new browser window will open, giving you the available full-text options.
A few caveats: