We have a public-facing SharePoint site. I am trying to send a notification to a user if they sign up to receive updates with their email address. SharePoint Designer is giving me this error:
The selected user(s) may not be valid on the site this workflow is published on. Of a recipient is not a valid SharePoint user, he or she will not receive workflow emails.
Does SharePoint 2013 not allow this? Any help is greatly appreciated!!