What I am going to cover in this article has been somewhat of a matzo ball in SharePoint Online for many years. I am, of course, talking about the external sharing of a site. Unlike file and folder sharing, which I described earlier, site sharing has a bit different authentication mechanism, and I will admit it – is confusing the hell out of everyone. So in this post, I would like to explain how external sharing works and how to successfully share a site in SharePoint externally without resorting to swearing and badmouthing of SharePoint.
Lees hier het hele artikel van Greg Zelfond.