Can I use the auto-citation feature from Ebsco for articles I find somewhere else online?
You can use the auto-citation from Ebsco in this situation, but you will need to change the part that specifies where you found it online. For instance, here is an auto-generated citation for an article from Ebsco database Academic Search Complete:
Rybak, Christopher, and Megha Deuskar. "Enriching Group Counseling Through Integrating Yoga Concepts And Practices." Journal Of Creativity In Mental Health 5.1 (2010): 3-14. Academic Search Complete. Web. 2 May 2013.
You should change the part that says Academic Seach Complete to the name (not the URL) of the web site where you found the text of the article.