Open Outlook (aaplication or browser) and populate recipient field
Not knowing the specifics of Articulate Storyline, but if you can add HTML one option is to use a regular "a" tag for this. It will open in the e-mail client that is default on the users computer though, which may be Outlook or something else.
<a href="mailto:[email protected]">Email link</a>
You can read more here: https://www.w3schools.com/tags/tag_address.asp