Find Full Text feature may not work on all databases. The restriction is either due to technical or business reasons of the databases' provider.
EndNote X6 also has an OpenURL feature that can find related online references. To use this feature: select the reference, then go to References > URL > OpenURL Link.
EndNote X6 can attempt to locate full text files on the Web by using data stored in your references. Once found, EndNote downloads and attaches the files to the references.
Before using the Find Full Text feature you need to perform a one-time set up: