The following applies to EBSCOhost databases such as Academic Search Complete.
Do not grab the URL from the browser's address bar. Doing so virtually ensures that the link will soon become unusable.
Instead, look for a Permalink located after the article/ebook title. You can copy this URL and be confident it will work from off-campus.
If you don't see this on the article page, you look for the toolbar on the side and select the Permalink option to display it.
NOTE: you can also grab permalinks to search results, by clicking the "Share" link at the top of the search results.
This video shows you how to grab permalinks in EBSCO.