In order for your students to access ebooks, articles--any thing from subscription databses--off-campus, you need to add Plattsburgh's proxy server prefix to the URL.
1. Copy the proxy server prefix:
http://webdb.outside.plattsburgh.edu:2048/login?url=
2. Paste the above at the beginning of a permalink/static URL from an article:

Or use the URL from an eBook in the catalog:

3. Your final URL that students can access off campus will look like this:
http://webdb.outside.plattsburgh.edu:2048/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=a9h&AN=91280082&site=ehost-live