No, I can tell you that they can not.... You would have to do some extra coding... What we found is although there is a "SingleSignOn" process.. the individual has to be in SmTrak for the Single Sign On to work correctly. At least that is our experience.
Also refer to this
https://portal.smartertools.com/community/a88244/single-signon-credentials-between-smail-strack-.aspx