I tried to search through the eight pages of forum topics, but there are just so many -- and entering "sharing" in the search box wasn't at all helpful (lol). I'm trying to share a notebook with two of my students who are working on a project with me, and there's no problem with one address. The other, however, is ghosted out. I tried to send it again, but she didn't receive it then either. Both attempts appear in the notebook under "share," but only one actually worked. Interestingly, the one that worked is a Gmail account, while the one that won't work is on my campus network. I can't see why that would be a problem, but maybe it is. Help?