EndNote uses four methods to lookup full-text documents for the citations in your library; three of these are automatic, but you'll need to configure the fourth.
In EndNote, open the EndNote preferences and switch to the Find Full Text sections. Enter
http://su8bj7jh4j.search.serialssolutions.com/ for the OpenURL Path.
https://login.ezproxy.lib.vt.edu/login for the Authentication URL (this make use of the Off Campus Sign In service).
Now EndNote will make use of all standard methods for connecting to full-text documents available from the Virginia Tech Libraries.
The university has a site license for the EndNote product and makes it available to all Virginia Tech faculty, staff, and students.
This product may be installed on any machines owned by the University. You may install it on personally owned machines if you are a graduate student, undergraduate student, faculty member or staff member of the University.
You have to be connected to the campus network, including the Virginia Tech VPN, to download EndNote from the Software Distribution Office site. Once downloaded and installed, check periodically to see if there have been updates.